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

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Question 991678: A girl is three years older than her brother. If their combined age is 35 years, how old is each?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

let's girl's age be g and boy's age b
if a girl is 3 years older than her brother, then we know that
g=b%2B3.......eq.1
if their combined age is 35 years, we know that
g%2Bb=35........eq.2...substitute b%2B3 for g
b%2B3%2Bb=35
2b=35-3
2b=32
b=32%2F2
b=16=> boy's age

g=b%2B3=>g=16%2B3=>g=19=>girl's age