Write down the solution for this math problem: Solve 98*k - 260 = -90*k + 208*k for k.
answer: -13

Write down the solution for this math problem: Solve 1992*i + 969*i + 56*i = 120680 for i.
answer: 40

Write down the solution for this math problem: Solve 33 = 21*k - 8*k - 2*k for k.
answer: 3

Write down the solution for this math problem: Solve 139*k - 666 = -3168 for k.
answer:
-18