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Phổ biến >

Susan is twice as old as Luna. The sum of their ages 4 years ago was 37. Find how old they are now.

Lời Giải

Susan is twice as old as Luna. The sum of their ages 4 years ago was 37. Find how old they are now.

Lời Giải

Luna^{'} s age is : 15

Susan^{'} s age is : 30

Các bước giải pháp

Translate the problem into an equation:

2 x - 4 + x - 4 = 37

Giải

x, 2 x - 4 + x - 4 = 37 : x = 15

Tìm age

Luna^{'} s age is : 15

Susan^{'} s age is : 30

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