Answer:
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!
