Write down the solution for this math problem: Solve 166*j = 313*j + 310*j + 174*j - 5679 for j.
answer: 9

Write down the solution for this math problem: Solve -31*u - 41*u + 720 = 0 for u.
answer: 10

Write down the solution for this math problem: Solve -117 = -25*i - 242 for i.
answer: -5

Write down the solution for this math problem: Solve 4*f = -1 - 15 for f.
answer:
-4