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Phổ biến Word Problems >

At present, a man is four times as old as his son. Six years ago, he was thirteen times as old ashis son. How old was the man when his son was born?

Lời Giải

A t p rese n t, a man i s f o u r t im es a s o l d a s hi s so n . S i x ye a rs a g o, h e w a s t hi r t ee n t im es a s o l d a s hi s so n . Ho w o l d w a s t h e man w h e n hi s so n w a s b or n ?

Lời Giải

age when Son was born : 24

Các bước giải pháp

Translate the problem into an equation:

4 x - 6 = 13 (x - 6)

Giải

x, 4 x - 6 = 13 (x - 6) : x = 8

Tìm age when Son was born:

24

age when Son was born : 24

Ví dụ phổ biến

Tim is now 12 years old. After how many years will his age be greater than twice his present age?A is now 34 years old, and B is 4 years old. In how many years will A be twice as old as B ?earl runs 75 meters in 30 seconds. how many meters does earl run per second When 8 times a number is increased by 4, the result is 60. Find the number.One number is thrice more than four times another. If the sum of the numbers is 18, what are the numbers?