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katie2212
Group Title
Use elimination to solve the system. What is the value of x?
4x + 7y = 14 and 8x + 5y = 8
 2 years ago
 2 years ago
katie2212 Group Title
Use elimination to solve the system. What is the value of x? 4x + 7y = 14 and 8x + 5y = 8
 2 years ago
 2 years ago

This Question is Closed

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
Hint: Multiply everything in the first equation by 2 to go from 4x + 7y = 14 to 8x  14y = 28
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
So you now have the two equations 8x  14y = 28 8x + 5y = 8
 2 years ago

RyanL. Group TitleBest ResponseYou've already chosen the best response.1
That's solving for x first and then plugging it back to get y. I thought that the OP wanted to do it from that one step.
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
you can go a number of ways, you can multiply the top equation by 5 and the bottom equation by 7, then add
 2 years ago

katie2212 Group TitleBest ResponseYou've already chosen the best response.0
im just getting more confused
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
I believe the answer is 14.
 2 years ago

katie2212 Group TitleBest ResponseYou've already chosen the best response.0
these are the options. 3.5 1.5 8 4
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
Oh then i bet the answer is 5
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
Do you see how I went from 4x + 7y = 14 to 8x  14y = 28
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
it's not 5
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
please don't give away the (incorrect) answer
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
sorry, if you would just give her the right answer, i would be able to go on with my day. As would she
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
I'm providing hints and trying to walk her through it (without giving it all away)
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
No matter how many hints your provide she doesn't care. she just wants the answer
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
well that's not what this site is for, I'm sry
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
if you keep this behavior up jefferyflow123go you will be reported (and possibly suspended/banned)
 2 years ago

katie2212 Group TitleBest ResponseYou've already chosen the best response.0
its hard for me too understand..im trying. i learn better in a class room thats why i am having trouble with my online class
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
its ok, you don't have to understand everything at once katie2212
 2 years ago

katie2212 Group TitleBest ResponseYou've already chosen the best response.0
but i have to understand if i want to finishe this exam.
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
Sorry for hekping. My mom always taught me to hekp and have pride in my work, so trying to be of assistance. I didn;t realize that you can be the only genious here. If you were that smart you'd know that she doesn't understand your hints and just wants the answer.
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
that's not helping though, you may think it is...but it's not
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
if you want, you can provide the steps so she can learn from them
 2 years ago

katie2212 Group TitleBest ResponseYou've already chosen the best response.0
okay will you guys please stop arguing and just help me!
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
ok I'll give steps on this one and hopefully it will be enough to answer similar ones, sound good?
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
IS your refrigderator running ? IF SO GO CATCH IT
 2 years ago

katie2212 Group TitleBest ResponseYou've already chosen the best response.0
yes thank you
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
My momma once told me, a fast runna' is the best runnna'
 2 years ago

katie2212 Group TitleBest ResponseYou've already chosen the best response.0
jeffery if youre not going to help please get out.
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
BUT IM JUST TRYNA HELP YOU. ILL CATCH YOUR FRIDGE FR YOU.
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
What did the bison say to his son when he left for college? Bison
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
4x + 7y = 14 ... Start with the first equation 2(4x + 7y) = 2*(14) ... Multiply both sides by 2 8x  14y = 28 ... Distribute and multiply  So 4x + 7y = 14 is the same as 8x  14y = 28  This means that the system 4x + 7y = 14 8x + 5y = 8 becomes 8x  14y = 28 8x + 5y = 8 Now add the two equations: 8x  14y = 28 8x + 5y = 8  0x  9y = 36 which means that 9y = 36 Solve for y to get 9y = 36 y = 36/(9) y = 4 Now that we know that y = 4, we can use this to find x. Pick on any equation, plug in y = 4 and solve for x 4x + 7y = 14 4x + 7(4) = 14 4x  28 = 14 4x = 14 + 28 4x = 14 x = 14/4 x = 7/2 x = 3.5 So the value of x is x = 3.5
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
IM SO PUNNY
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
IM A MaTH WIZ
 2 years ago

katie2212 Group TitleBest ResponseYou've already chosen the best response.0
Thank you Jim
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
yanno wizard like Harry Potter
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
The idea here is to get the x coefficients equal and opposite. Then you add the equations. Doing so will cancel out the x terms so you can solve for y
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
then you use that value of y to find x
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
you've been reported jefferyflow123go, have a nice day
 2 years ago

jefferyflow123go Group TitleBest ResponseYou've already chosen the best response.0
you too good sir(:
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
good luck with that one, I don't spam and harass others so your claim will be without merit
 2 years ago
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