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פּוֹפּוּלָרִי Word Problems >

Two years ago, Jernie was three times as old as his sister, Cecile. In 4 years, he will be only twice his sister's age. Find their present ages.

פתרון

Tw o ye a rs a g o, J er ni e w a s t h ree t im es a s o l d a s hi s s i s t er, C ec i l e . I n 4 ye a rs, h e w i ll b e o n l y tw i ce hi s s i s t e r^{'} s a g e . F in d t h e i r p rese n t a g es .

פתרון

Jernie^{'} s age is : 20

Cecile^{'} s age is : 8

צעדי פתרון

Translate the problem into an equation:

x - 2 = 3 (y - 2), x + 4 = 2 (y + 4)

x - 2 = 3 (y - 2), x + 4 = 2 (y + 4) : x = 20, y = 8

Jernie^{'} s age is : 20

Cecile^{'} s age is : 8

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