Question

Solve each system by substitution method.
X=2y+11
7x+2y=13

Answer 1

`y = - 4`

Step by step Step-by-step explanation:

Equation 1:

`x = 2y + 11`

Equation 2:

`7x + 2y = 13`

Put the value of X from equation 1 into equation 2.

`7(2y + 11) + 2y = 13`

Solve the brackets.

`14y + 77 + 2y = 13`

Simplify.

`16y + 77 = 13`

Send 77 to the other side.

`16y= 13 - 77`

`16y = - 64`

Send 16 to the other side.

`y = - (64)/(16)`

Answer:

`y = - 4`

Hope this helped!

Answer 2

Step-by-step explanation:

you need to substitute the x in (7x +2y=13) with (x=2y+11) to solve it