Write down the solution for this math problem: Solve -d = d + 2 for d.
answer: -1

Write down the solution for this math problem: Solve 1699*d + 338*d - 2236 = -199 for d.
answer: 1

Write down the solution for this math problem: Solve 0 = -4*r - 13 + 25 for r.
answer: 3

Write down the solution for this math problem: Solve 34*u + 624 = 58*u for u.
answer:
26