Question:
Solve 0 = 22*i - 10*i + 12 for i..

Answer:
-1

Question:
Solve 708*z - 80 = 700*z for z..

Answer:
10

Question:
Solve 325*k + 1309*k - 31302 = -227*k + 122*k for k..

Answer:
18

Question:
Solve 7203 = 1489*j - 1832*j for j..

Answer:
-21