Question:
Solve 26*x - 74 + 230 = 0 for x..

Answer:
-6

Question:
Solve 533*z + 6194 = -1356 + 1154 for z..

Answer:
-12

Question:
Solve 272*o = 267*o - 25 for o..

Answer:
-5

Question:
Solve 28*r + 26 = 15*r for r..

Answer:
-2