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Phổ biến Word Problems >

4.A father is 7times as old as his son. Two years ago, the father was 13 times as old asa his son. What are their preaent ages?

Lời Giải

4. A f a t h er i s 7 t im es a s o l d a s hi s so n . Tw o ye a rs a g o, t h e f a t h er w a s 13 t im es a s o l d a s a hi s so n . Wha t a re t h e i r p re a e n t a g es ?

Lời Giải

Boy^{'} s age is : 4

Father^{'} s age is : 28

Các bước giải pháp

Translate the problem into an equation:

7 x - 2 = 13 (x - 2)

Giải

x, 7 x - 2 = 13 (x - 2) : x = 4

Tìm age

Boy^{'} s age is : 4

Father^{'} s age is : 28

Ví dụ phổ biến

19.Terry is 8 years older than Jenny. The sum of their ages is 56. How old is Terry?alvin is 8 years younger than elga. the sum of their age is 80. what is elgas age 5 years ago, Nina was twice as old as Sam. In five years, she will be 1.5 times as old as Sam. How old are Sam and Nina now?Landon’s age is 3 years less than 3 times his brother’s age. Landon’s age is 9 minus his brother’s age. How old is Landon Michael is 2 years older than Brandon. Seventeen years ago, Michael was 4 times as old as Brandon.