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Phổ biến Word Problems >

A mother is currently 10 times older than her son. In 4 years time, she will be 7 times older than her son.

Lời Giải

A m o t h er i s c u rre n tl y 10 t im es o l d er t han h er so n . I n 4 ye a rs t im e, s h e w i ll b e 7 t im es o l d er t han h er so n .

Lời Giải

Boy^{'} s age is : 8

Mother^{'} s age is : 80

Các bước giải pháp

Translate the problem into an equation:

10 x + 4 = 7 (x + 4)

Giải

x, 10 x + 4 = 7 (x + 4) : x = 8

Tìm age

Boy^{'} s age is : 8

Mother^{'} s age is : 80

Ví dụ phổ biến

A man is 10 times older than his grandson. He is also 54 years older than him. Find their present ages.Sylvia is 12 years older than her sister Stacy. She is also 5 times as old as Stacy. How old is sylvia Five year ago Nina was twice as old as Sam. In five years she will be 1.5 times as old as Sam. How are Sam and Nina now.In 6 years' time, Jane's father will be three times as old as her and the sum of their ages will be 64. How old is her father now?Andrew is 138 years old .erica is 21 years old . how many years until Andrew age is 4 times erica age