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Mark is 7 years older than Mariah. In 4 years the sum of their ages will be 77. How old is Mark now?

Solution

Mark is 7 years older than Mariah. In 4 years the sum of their ages will be 77. How old is Mark now?

Solution

Mark^{'} s age is : 38

Solution steps

Translate the problem into an equation:

x + 4 + x - 7 + 4 = 77

Solve for

x, x + 4 + x - 7 + 4 = 77 : x = 38

Mark^{'} s age is : 38

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