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Popolare >

A boy is 6 years older than his sister. In three years, he will be twice her age. What are their present ages?

Soluzione

A boy is 6 years older than his sister. In three years, he will be twice her age. What are their present ages?

Soluzione

Boy^{'} s age is : 9

Sister^{'} s age is : 3

Fasi della soluzione

Translate the problem into an equation:

x + 3 = 2 (x - 6 + 3)

Risolvi per

x, x + 3 = 2 (x - 6 + 3) : x = 9

Trova age

Boy^{'} s age is : 9

Sister^{'} s age is : 3

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