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Lucy is four times younger than her sister. If the sum of their age is 30. What are their ages?

Solution

Lucy is four times younger than her sister. If the sum of their age is 30. What are their ages?

Solution

Sister^{'} s age is : 6

Lucy^{'} s age is : 24

Solution steps

Translate the problem into an equation:

4 x + x = 30

Solve for

x, 4 x + x = 30 : x = 6

Find age

Sister^{'} s age is : 6

Lucy^{'} s age is : 24

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