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פּוֹפּוּלָרִי >

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

פתרון

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

פתרון

Mark^{'} s age is : 38

צעדי פתרון

Translate the problem into an equation:

x + 4 + x - 7 + 4 = 77

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

פתור בשביל:

x = 38

Mark^{'} s age is : 38

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