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Phổ biến Word Problems >

father is now three times as old as his son. Five years back, he was four times as old as his son. The age of the son (in years) is

Lời Giải

f a t h er i s n o w t h ree t im es a s o l d a s hi s so n . F i v e ye a rs ba c k, h e w a s f o u r t im es a s o l d a s hi s so n . T h e a g e o f t h e so n (in ye a rs) i s

Lời Giải

Son^{'} s age is : 15

Father^{'} s age is : 45

Các bước giải pháp

Translate the problem into an equation:

3 x - 5 = 4 (x - 5)

Giải

x, 3 x - 5 = 4 (x - 5) : x = 15

Tìm age

Son^{'} s age is : 15

Father^{'} s age is : 45

Ví dụ phổ biến

Kenny is 40 years old. Brendan is 66 years younger than Christina and 31 years younger than Kenny. How old is Christina?a camera has a listed price for 811.99 before tax. The sales tax rate is 6.75% find the total price of the camera with tax and round to the nearest cent 4 2/5 of what number is 7 7/10 Twice a number increased by 29 is 169.Chau wants to buy a bond that will mature to 5000 in eight years. How much should he pay for the bond now if it earns interest at a rate of 3.5% per year, compounded continuously?