Write down the solution for this math problem: Solve -42*r - 7*r - 50933 = 11*r - 48053 for r.
answer: -48

Write down the solution for this math problem: Solve -17*z = 2 + 25 - 10 for z.
answer: -1

Write down the solution for this math problem: Solve 0 = -11*d - 79 - 42 for d.
answer: -11

Write down the solution for this math problem: Solve 4*o = 2*o + 8 for o.
answer:
4