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the sum of the ages of a boy and a girl is 18 years. Four years ago the girl was four times the age of the boy. Find the present age of each child.

Solución

the sum of the ages of a boy and a girl is 18 years. Four years ago the girl was four times the age of the boy. Find the present age of each child.

Solución

Boy^{'} s age is : 6

Girl^{'} s age is : 12

Pasos de solución

Translate the problem into an equation:

18 - x - 4 = 4 (x - 4)

Resolver para

x, 18 - x - 4 = 4 (x - 4) : x = 6

Hallar age

Boy^{'} s age is : 6

Girl^{'} s age is : 12

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