Write down the solution for this math problem: Solve -1 = 2*k + 3 for k.
answer: -2

Write down the solution for this math problem: Solve 78624 = 90896*q - 89960*q for q.
answer: 84

Write down the solution for this math problem: Solve 6522 = -12*r + 6438 for r.
answer: -7

Write down the solution for this math problem: Solve 98*v + 352 = 142*v for v.
answer:
8