Write down the solution for this math problem: Solve 9 = 10*t - 38 - 153 for t.
answer: 20

Write down the solution for this math problem: Solve 31*k - 16*k = 11*k + 20 for k.
answer: 5

Write down the solution for this math problem: Solve 1000 - 568 + 4230 = -222*j for j.
answer: -21

Write down the solution for this math problem: Solve -133*a = -69*a - 43*a + 42 for a.
answer:
-2