A community for students.
Here's the question you clicked on:
 0 viewing
InsanelyChaotic
 2 years ago
Would anyone be so gracious as to helping me get a better understanding of the dreadful algebra!??!?!!? :)
Explain, in complete sentences, how you would use the elimination method to solve the following system of equations. Provide the solution to the system.
2x + 9y = 4
3x + 7y = 7
InsanelyChaotic
 2 years ago
Would anyone be so gracious as to helping me get a better understanding of the dreadful algebra!??!?!!? :) Explain, in complete sentences, how you would use the elimination method to solve the following system of equations. Provide the solution to the system. 2x + 9y = 4 3x + 7y = 7

This Question is Closed

Venomblast
 2 years ago
Best ResponseYou've already chosen the best response.01st you want to figure out which variable you want to solve

Venomblast
 2 years ago
Best ResponseYou've already chosen the best response.0ok. oh n btw i replied. the answer is A!!! fromt he previous question

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0thank you love!!!! :)))))))))))) I got that answer after I "closed" the question box

Venomblast
 2 years ago
Best ResponseYou've already chosen the best response.0i said it 2 times. lol anywayz let do this problem

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0thank you nonetheless! ok let's go!

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1Hey, an intermission, if you would oblige me... if x = y, then ax = ay right?

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1And if a = b and c = d then a + c = b + d Don't worry, these are relevant, we'll use them.

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0Thank you kind sir....! @terenzreignz

Venomblast
 2 years ago
Best ResponseYou've already chosen the best response.0man i hate the ax=ay method

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1So you have 2x + 9y = 4 From our first rule, we can get 7(2x + 9y) = 7(4) 14x + 63y = 28, let's stop here, and call this "equation 1" You also have 3x + 7y = 7 Again, from our first rule, we can get 9(3x + 7y) = 9(7) 27x  63y = 63, stop here again, call this "equation 2" Are you getting it so far?

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0Yes, I've gone thru this a time before! But one question, how did you get the "7" in 7(2x+9y)

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0If you don't mind me asking.....! :))

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0Here's a joke: Subway called, they want their 6 inch back ;)

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0Another joke/flattery I made up: Verizon called, they want their "SMART" phone back

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1Ok... You said you wanted to solve for x first (personally, I'd have gone for y first) So, we have to somehow get rid of the y. To do that, you have to make it so that the coefficient (the number that goes beside the letter) of the y in the first equation is equal to the NEGATIVE of the coefficient of the y in the second equation. In the first equation, the coeff of y was "9" and in the second, it was "7" You need to get what's called their "least common multiple" And that's 63. 63/9 is 7, so that's what I multiply to the first equation. 63/7 is 9, so that's what I multiply to the second equation, and then I NEGATED it (multiplied it by 1)

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1You'll see why this is done, when I proceed... shall I?

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0oh my god....this is actually making sense!!!!! :')

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1Remember our second rule? if a=b and c=d then a+c = b+d ? We'll just apply that, on a larger scale, sort of...

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0I remember! I will, I promise!

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1All right, equation 1: 14x + 63y = 28 equation 2: 27x  63y = 63 Remember these?

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1Now we use the second rule, we add both expressions on the left, and equate them to the sum of the expressions on the right: 14x + 63y  27x  63y = 28 + 63

Venomblast
 2 years ago
Best ResponseYou've already chosen the best response.0combine like term *cough**cough*

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0I'm writing down the steps to refer to, but yes, I notice that in order to prolong the steps, I'll have to combine

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0Get x by itself

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1And then you'll have reduced it to a linear equation in one variable. Solve for x, and you're almost done! Just substitute that x which you get for the x in either one of the equations you started with, and then solve for y, and then you'll be done!

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0oh my....I appreciate your efforts!!

terenzreignz
 2 years ago
Best ResponseYou've already chosen the best response.1I appreciate your appreciation; have fun! :)

InsanelyChaotic
 2 years ago
Best ResponseYou've already chosen the best response.0I will never have fun with math, but thank you:)
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.