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Phổ biến >

Andrei is 6 years older than his sister Andrea. After 10 years, the sum of their ages will be 50. How old is Andrea?

Lời Giải

Andrei is 6 years older than his sister Andrea. After 10 years, the sum of their ages will be 50. How old is Andrea?

Lời Giải

Andrea^{'} s age is : 12

Các bước giải pháp

Translate the problem into an equation:

x + 10 + x - 6 + 10 = 50

Giải

x, x + 10 + x - 6 + 10 = 50 : x = 18

Tìm Andrea's age

: 12

Andrea^{'} s age is : 12

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