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Популярное Word Problems >

In 3 years, Toni will be 3 times as old as his sister Alex. A year ago, Toni was 7 times as old as Alex. How old are they now?

Решение

I n 3 ye a rs, T o ni w i ll b e 3 t im es a s o l d a s hi s s i s t er A l e x . A ye a r a g o, T o ni w a s 7 t im es a s o l d a s A l e x . Ho w o l d a re t h ey n o w ?

Решение

Toni^{'} s age is : 15

Alex^{'} s age is : 3

Шаги решения

Translate the problem into an equation:

x + 3 = 3 (y + 3), x - 1 = 7 (y - 1)

x + 3 = 3 (y + 3), x - 1 = 7 (y - 1) : x = 15, y = 3

Toni^{'} s age is : 15

Alex^{'} s age is : 3

Популярные примеры

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