What is the solution to 15 - 4y = -21 - y

y = 12

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

15 - 4y = - 21 - y

15 + - 4y = - 21 + - y

- 4y + 15 = - y - 21

Step 2: Add y to both sides.

- 4y + 15 + y = - y - 21 + y

- 3y + 15 = - 21

Step 3: Subtract 15 from both sides.

- 3y + 15 - 15 = - 21 - 15

- 3y = - 36

Step 4: Divide both sides by - 3.

- 3y/- 3 = -36/- 3

y = 12

I am so sorry if it is long and confusing, but, I hope this still helps!