Q: Solve -294 + 6 - 300 = -28*r for r.

A: 21

Q: Solve -4*t - 5*t + 87*t = 0 for t.

A: 0

Q: Solve -338*i - 10955 + 19724 = 2585*i for i.

A: 3

Q: Solve 832 = 4*x - 38*x + 152 for x.

A:
-20