Question

ill fan you and give you a medal if someone helps me(:
Find the solution of this system of equations.
Separate the x-and y- values with a comma.
x=10+y
12x-9y=9

Answer 1

@LunyMoony

Answer 2

@ganeshie8 , danish071996 said that you might be able to help me

Answer 3

Hi, we'll need to plug in "x=10+y" in the second equation and solve for y, can you do that ?

Answer 4

how would you do that?

Answer 5

Simply by replacing "x" with its value "10+y" like this :
12(10+y) - 9y = 9
Can you solve for y now ?

Answer 6

I can try give me a min

Answer 7

Sure, you can write it on paper and take a picture of it if it's easier for you.

Answer 8

is there a simpler way to find y besides putting in random a_ss seeing if they work

Answer 9

y=-3

Answer 10

actually its 3 not (-3)

Answer 11

How did you get that ?

Answer 12

just put in random numbers from 1-10 positive and negative and -s - so I made the 3 a + and it worked

Answer 13

Plugging in random numbers is not how you do it. it's gonna cost you a lot of time and you're not sure to get a correct answer. Here's how you do it :
12(10+y) - 9y = 9
120 + 12y - 9y = 9 (using FOIL)
-120 -120
12y - 9y = 9 - 120
3y = -111
y = -111/3
y = -37

Answer 14

im not good in math lol but can you help me on like 6 more?

Answer 15

@math&ing001

Answer 16

Well this one is not over yet, we still have to find x.

Answer 17

ugh! ;p okay

Answer 18

Ok, plug in y=-37 in the first equation x=10+y, and solve for x. Just like we did before.

Answer 19

And this one you'll need to find for yourself :)
I'll walk you through if you need any help.

Answer 20

@lexikaylynn

Answer 21

okay

Answer 22

x=-27

Answer 23

Yep, correct !

Answer 24

so the answer is -27, -37??

Answer 25

Yes (x,y) = (-27,-37)

Answer 26

thanks (: do you think you can help me on like 6 more?

Answer 27

I have to go now, but I'll help you as soon as I get back.

Answer 28

okay when will that be?