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John is 81 years older than Peter. In 3 years, John will be 4 times as old as Peter. How old is Peter now?

Solution

John is 81 years older than Peter. In 3 years, John will be 4 times as old as Peter. How old is Peter now?

Solution

Peter^{'} s age is : 24

Solution steps

Translate the problem into an equation:

x + 3 = 4 (x - 81 + 3)

Solve for

x, x + 3 = 4 (x - 81 + 3) : x = 105

Find Peter's age

: 24

Peter^{'} s age is : 24

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