The value of the expression 8-y is 2 times as large as the value of the expression 7+y. Solve for y.

y = - 2

Step-by-step explanation:

8 - y = 2 (7+y)

Distribute the right side

8 - y = 2x7 + 2xy

8 - y = 14 + 2y

Collect like terms

8 - 14 = y + 2y

-6 = 3y

Divide both sides by 3

-6/3 = 3y/3

-2 = y

y = - 2