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A mother is currently 10 times older than her son. In 4 years time, she will be 7 times older than her son. Use substitution to find answer.

Solution

A mother is currently 10 times older than her son. In 4 years time, she will be 7 times older than her son. Use substitution to find answer.

Solution

Boy^{'} s age is : 8

Mother^{'} s age is : 80

Solution steps

Translate the problem into an equation:

10 x + 4 = 7 (x + 4)

Solve for

x, 10 x + 4 = 7 (x + 4) : x = 8

Find age

Boy^{'} s age is : 8

Mother^{'} s age is : 80

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