Answer: The running for movie A is 81 minutes.
The running for movie B is 47 minutes.
Step-by-step explanation:
Let x represent the running for movie A.
Let y represent the running for movie B.
The running time for movie A is 34 minutes more than twice the running time for movie B.
This means that
x = y + 34
If the running time for movie A is subtracted from triple the running time for movie B, the result is 60 minutes. This means that
3y - x = 60 - - - - - - - - - - - - 1
Substituting x = y + 34 into equation 1, it becomes
3y - (y + 34) = 60
3y - y - 34 = 60
2y = 60 + 34
2y = 94
y = 94/2
y = 47
x = y + 34 = 47 + 34
x = 81
