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Marge is twice as old as Consuelo. The sum of their ages seven years ago was thirteen. How old are they now?

Solution

Marge is twice as old as Consuelo. The sum of their ages seven years ago was thirteen. How old are they now?

Solution

Consuelo^{'} s age is : 9

Marge^{'} s age is : 18

Solution steps

Translate the problem into an equation:

2 x - 7 + x - 7 = 13

Solve for

x, 2 x - 7 + x - 7 = 13 : x = 9

Find age

Consuelo^{'} s age is : 9

Marge^{'} s age is : 18

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