Question

jim is 13 years older than tom the sum of their age is 75. how old is tom and how old is jim

Answer 1

x + x + 13 = 75

2x = 62

x = 31

Tom is 31.

Answer 2

Jim - 13 = Tom

Jim + Tom = 75

Jim + (Jim - 13) = 75

2 Jim - 13 + 75

2 Jim = 88
so
Jim = 44
Tom = Jim-13 = 31