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פּוֹפּוּלָרִי Word Problems >

Two years ago John was three times as old as Frank. Five years from now John will be twice as old as Frank. what is the sum of their ages right now?

פתרון

Tw o ye a rs a g o J o hn w a s t h ree t im es a s o l d a s F r ank . F i v e ye a rs f ro m n o w J o hn w i ll b e tw i ce a s o l d a s F r ank . w ha t i s t h e s u m o f t h e i r a g es r i g h t n o w ?

פתרון

the sum of their ages : 32

צעדי פתרון

Translate the problem into an equation:

x - 2 = 3 (y - 2), x + 5 = 2 (y + 5)

x - 2 = 3 (y - 2), x + 5 = 2 (y + 5) : x = 23, y = 9

the sum of their ages מצא את:

32

the sum of their ages : 32

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