A girl is three years older than her brother. If their combined age is 35 years, how old is each

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A girl is three years older than her brother. If their combined age is 35 years, how old is each

Let the girl's age be g. Let the boy's age be b. We're given two equations:

1. g = b + 3 (Older means we add)
2. b + g = 35

Now plug in equation (1) into equation (2) for g:
b + b + 3 = 35

To solve for b, we type this equation into our search engine and we get:
b = 16

Now, to solve for g, we plug in b = 16 that we just solved for into equation (1):
g = 16 + 3
g = 19