Write down the solution for this math problem: Solve -531*l = -505*l - 130 for l.
answer: 5

Write down the solution for this math problem: Solve -10169*d + 203 - 909 = -10238*d + 122 for d.
answer: 12

Write down the solution for this math problem: Solve -1203*v + 30520 = 323*v for v.
answer: 20

Write down the solution for this math problem: Solve -71*j - 794 = 555 for j.
answer:
-19