Write down the solution for this math problem: Solve 0 = -11*x - 4*x - 135 for x.
answer: -9

Write down the solution for this math problem: Solve -7*a - 28 - 7 = 0 for a.
answer: -5

Write down the solution for this math problem: Solve -a - 108 = 11*a for a.
answer: -9

Write down the solution for this math problem: Solve -1728 = -125*b - 19*b for b.
answer:
12