Question:
Solve 335*r - 38*r + 114*r + 1233 = 0 for r..

Answer:
-3

Question:
Solve 37*i - 68*i - 30 = 200 + 421 for i..

Answer:
-21

Question:
Solve 230*s + 1071 = 111*s for s..

Answer:
-9

Question:
Solve -2*z = 445 - 431 for z..

Answer:
-7