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인기 있는 Word Problems >

The sum of the ages of a father and son is 56. Four years ago, the father was 3 times as old as the son. how old is the son now

해법

T h e s u m o f t h e a g es o f a f a t h er an d so n i s 56. F o u r ye a rs a g o, t h e f a t h er w a s 3 t im es a s o l d a s t h e so n . h o w o l d i s t h e so n n o w

해법

Boy^{'} s age is : 16

솔루션 단계

Translate the problem into an equation:

x - 4 = 3 (56 - x - 4)

x

해결 대상

, x - 4 = 3 (56 - x - 4) : x = 40

Boy's age 찾다 :

16

Boy^{'} s age is : 16

인기 있는 예

15% of a number is 45. Find the number 3 years ago, Jeanette won some money in the lottery and put it in a bank account that earns 3% interest compounded monthly. If Jeanette currently has 200.00 in the bank account, how much interest has she earned?The product of a number and 10 is 100.what is the revenue for 200.00 for 12 months 2nd triangular number