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Joe is 12 years old. His mother is four times older than him. In x year's time, the mother will be three times as old as the son. Find the value of x

解答

Joe is 12 years old. His mother is four times older than him. In x year's time, the mother will be three times as old as the son. Find the value of x

解答

Boy^{'} s age is : 16

Joe^{'} s age is : 12

Mother^{'} s age is : 48

求解步骤

Translate the problem into an equation:

3 x = 4 \cdot 12

求解

x, 3 x = 4 \cdot 12 : x = 16

找到 age

Boy^{'} s age is : 16

Joe^{'} s age is : 12

Mother^{'} s age is : 48

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