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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

해법

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

해법

Toni^{'} s age is : 15

Alex^{'} s age is : 3

솔루션 단계

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

인기 있는 예

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