Question

please help!? <3




If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.

x + y = 2
3x + 2y = 9

choices:
3(y + 2) + 2y = 9

3(–y + 2) + 2y = 9

3x + 2(y + 2) = 9

3x + 2(–y + 2) = 9
I think it might be C...but I'n most likley wrong.

Answer 1

Here this might help you :) http://openstudy.com/study#/updates/4ecfb176e4b04e045af38f49

Answer 2

ok can you first tell me what x and y are from first equation?

Answer 3

uhm... 1?

Answer 4

x + y = 2

write x in terms of y and y in terms of x

Answer 5

x=?

y=?

Answer 6

3(2-y)+2y = 9
x + y = 2
x = 2 - y
3(2-y) + 2y = 9

Answer 7

I don't understand.

Answer 8

let x=(2-y)
3x + 2y = 9 .............eqn 2
put d value of x in eqn 2
3(2-y) + 2y=9
6-3y+2y=9
6-y=9
y=-3

Answer 9

so avin y as -3
in eqn 2
3x+2(-3)=9
3x-6=9
3x=15
x=5