Write down the solution for this math problem: Solve 9350 = -98647894*r + 98647809*r for r.
answer: -110

Write down the solution for this math problem: Solve -250*g - 448 = -550*g + 272*g for g.
answer: 16

Write down the solution for this math problem: Solve -5*u - u = 11*u + 170 for u.
answer: -10

Write down the solution for this math problem: Solve -4911 = 18*z - 5037 for z.
answer:
7