Answer:
Train A = 403
Train B = 48
Explanation:
A + B = 451
A - B = 355
Solve by adding the equations together.
2A = 806
806 / 2 = A
A = 403
Plug in 403 for A
403 + B = 451
451 - 403 = B
B = 48
1.6m questions
2.0m answers