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Ray is 19 years older than his sister Danielle. In 10 years, he will be twice as old as Danielle. How old is each of them now?

Solution

Ray is 19 years older than his sister Danielle. In 10 years, he will be twice as old as Danielle. How old is each of them now?

Solution

Ray^{'} s age is : 28

Danielle^{'} s age is : 9

Solution steps

Translate the problem into an equation:

x + 10 = 2 (x - 19 + 10)

Solve for

x, x + 10 = 2 (x - 19 + 10) : x = 28

Find age

Ray^{'} s age is : 28

Danielle^{'} s age is : 9

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