Write down the solution for this math problem: Solve 10*v + 5*v = 803 - 938 for v.
answer: -9

Write down the solution for this math problem: Solve 695*x + 1715*x = -2810*x + 1061*x - 320243 for x.
answer: -77

Write down the solution for this math problem: Solve 20*f = -856 + 1016 for f.
answer: 8

Write down the solution for this math problem: Solve -37*l = -23*l + 56 for l.
answer:
-4