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인기 있는 Word Problems >

Tommy is 3 years older than Fred. 4 years ago, Tommy was 4 times as old as Fred. Calculate Fred's present age.

해법

T o mm y i s 3 ye a rs o l d er t han F re d . 4 ye a rs a g o, T o mm y w a s 4 t im es a s o l d a s F re d . C a l c u l a t e F re d^{'} s p rese n t a g e .

해법

Fred^{'} s age is : 5

솔루션 단계

Translate the problem into an equation:

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

x

해결 대상

, x - 4 = 4 (x - 3 - 4) : x = 8

Fred's age 찾다 :

5

Fred^{'} s age is : 5

인기 있는 예

You know the perimeter of a square to be 16 meters. Find the length of one side.What is the result when the number 22 is decreased by 9.1%?four times a number decreased by six 7.5% of what number is 6.75 Ashley has 5,000 in an account that earns 5% interest compounded annually.To the nearest cent, how much will she have in 3 years?