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Popolare 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?

Soluzione

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 ?

Soluzione

the sum of their ages : 32

Fasi della soluzione

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

Trova the sum of their ages :

32

the sum of their ages : 32

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