Question 604534
Ben's age = B
Dan's age = D


B = D - 3
B + D = 53
substitute the first equation into the second equation:
D - 3 + D = 53
2D - 3 = 53
2D = 53 + 3
2D = 56
D = 56/2 = 28
B = D - 3 = 28 - 3 = 25


so, Ben is 25 years old and Dan is 28 years old