Use substitution to solve the linear system.

Question

3x+4y=27
y=x-2

Answer 1

3x+4(x-2)=27

3x+4x-8=27

7x-8=27

7x=35

x=5

Answer 2

y=3

Answer 3

thx

Same as first one except choices i got B is this correct. If not what is it and how do you get this answer?

3x+4y=-11
y=-x-2

A. (-5,1) B.(4,-6) C. (3,-5)
D. No Solution

Answer 4

the answer is C

3x+4(-x-2)=-11

3x-4x-8=-11

-1x-8=-11

-1x=-3

x=3

y= -(3)-2

y=-5

any questions?

Answer 5

Ahhh i miss coulculated.

one more i thank im geting the hang of it now tho.

y=x-2
y=2x

Answer 6

set it up like this

x-2=2x

then x=-2

Answer 7

does y=0

Answer 8

No , y is not zero. It is twice x