6.5X+1.4y=59
What is the value of x when y=5?
i dont know how to do this, help??

- anonymous

6.5X+1.4y=59
What is the value of x when y=5?
i dont know how to do this, help??

- jamiebookeater

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- anonymous

you can look at this equation like this, 1.4 is being multiplied to the y right?

- anonymous

you can see that?

- anonymous

Yess

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## More answers

- anonymous

so that y in that equation is just a place holder. you can plug in any number into that y and see what x is

- anonymous

So would you multiply the x to 5?

- anonymous

for example x + y = 3 what is x when y = 2
you would replace 2 for y ===> x + 2 = 3
now you can solve for x

- anonymous

I'm so confused, I'm sorry, I'm not good in math lol. you're gonna have to break it down more, if possible.

- anonymous

for this one you have 6.5x + 1.4y = 59
what is x when y = 5
so replace y with 5
6.5x + 1.4 * 5 = 59

- anonymous

now you can solve for x

- anonymous

okay

- anonymous

okay, haha

- anonymous

let me know what is confusing to you. cause the equation can look confusing because of the decimals.

- anonymous

Like, I understand how to replace it now, but what am I supposed to do??

- anonymous

okay great

- anonymous

so can i ask you to show me what you get

- anonymous

huh?

- anonymous

like what does it look like when you replace that 5 with that y. the y should be gone and the 5 should be in its place.

- anonymous

yes got that part

- anonymous

can you show me how it looks by typing it in

- anonymous

your going to be a champion at this after no worries. because these problems are the same everytime

- anonymous

6.5x+5=59
And thanks :)

- anonymous

yeah that looks good. but remember you are multiplying by that 1.4

- anonymous

because the y was multiplied by the 1.4
the 5 should also be multiplied by 1.4

- anonymous

so, 6.5x+7=59 ?

- anonymous

and then do you subract the 7 from both sides, and divide by 6.5?

- anonymous

yeah thats perfect. you seem to be good at solving for x. because waht you just said is exactly how you "SOLVE FOR X" is what its called lol
just take a step back and look at what you did.
you plugged 5 into y so it went from
6.5x + 1.4y = 59 to
6.5x + 1.4(5) = 59
and yeah the 1.4(5) = 7 so its exactly what you got
6.5x + 7 = 59

- anonymous

YAYYY thank you! Um, could you also help me with something else?

- anonymous

what you did is called "plugging in" you stuck the 5 into the y.
and that means when y =5 x = when you solve for x like you said

- anonymous

yess

- anonymous

but i need help with another problem

- anonymous

yeah def

- anonymous

okay, so i have -7(x-2)+5(-3x)-4x
I know how to multiply them while in the parenthesis, but how do i solve for like terms?

- anonymous

like i said these problems are the same everytime you plug in a number into x OR y what ever they ask. and then you can find out what the other one is

- anonymous

okay yeah multiply them out and type what you get

- anonymous

i screwed it up

- anonymous

it was +5(3-X)

- anonymous

i got -7x-14+15-5x-4x

- anonymous

nice

- anonymous

now what do i do?

- anonymous

okay you can think of the x's as money.

- anonymous

yes

- anonymous

when its negative you owe a friend some money you borrowed and when its positive you owed money

- anonymous

looks like you may be broke lol just because of the equation. so what you do is you all the like terms

- anonymous

so you can subtract -7-5-4

- anonymous

alright..

- anonymous

it is -16. also bring the other ones together you have -14+15 = 1

- anonymous

right?

- anonymous

so the final result is -16x + 1

- anonymous

yes

- anonymous

OHH got it (:

- anonymous

it looks nice like this 1 - 16x

- anonymous

right? lol

- anonymous

but either way is correct

- anonymous

thank you so so so muchh(:

- anonymous

yeah i think you learned a lot

- anonymous

you learned to plug in

- anonymous

the second thing is called "accumulating terms"
a term is something in an equation that is being added or subtracted

- anonymous

so in your equation its 5 terms

- anonymous

like 2x + 3
has 2

- anonymous

also this is a term 2(x-4)

- anonymous

so it could be 2(x-4) + 4(x-5)
^ ^
those are both terms so theres two

- anonymous

okay i gtg peace

- anonymous

can you give me a medal lol

- anonymous

lol how

- anonymous

next to my name on the right it says give medal

- anonymous

i gave you one

- anonymous

next to my name on the right it says give medal

- anonymous

thanks(: okay

- anonymous

you didnt give me on! lol no biggy. are you in highschool?

- anonymous

one*

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