Write down the solution for this math problem: Solve -280 = 22*d + 36*d - 2*d for d.
answer: -5

Write down the solution for this math problem: Solve r - 53 + 60 = 0 for r.
answer: -7

Write down the solution for this math problem: Solve -68*m - 756 = -280 for m.
answer: -7

Write down the solution for this math problem: Solve 9840*d - 8725*d + 89200 = 0 for d.
answer:
-80