Write down the solution for this math problem: Solve 11*x - 8*x + 12*x = -30 for x.
answer: -2

Write down the solution for this math problem: Solve 38*v - 22*v - 32*v = 62 + 146 for v.
answer: -13

Write down the solution for this math problem: Solve -20 = 15*t + 21 + 19 for t.
answer: -4

Write down the solution for this math problem: Solve 6*l + 15 = l for l.
answer:
-3