Write down the solution for this math problem: Solve -5*j - 4 = 6 for j.
answer: -2

Write down the solution for this math problem: Solve 0 = -12*i + 17*i for i.
answer: 0

Write down the solution for this math problem: Solve 12*y - 58 = -17*y for y.
answer: 2

Write down the solution for this math problem: Solve 7*u = 18*u + 21*u - 192 for u.
answer:
6