Write down the solution for this math problem: Solve 8*j = 7*j + 4 for j.
answer: 4

Write down the solution for this math problem: Solve 3*a + 15 = -0 for a.
answer: -5

Write down the solution for this math problem: Solve 15*s - 30*s + 126 = -6*s for s.
answer: 14

Write down the solution for this math problem: Solve 5698*a - 372*a + 21953 = 298905 for a.
answer:
52