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Популярное Word Problems >

bruce is 4 years younger than Hector. Twenty years ago Hectors age was 13 years more than half the age of Bruce. How old are they now?

Решение

b r u ce i s 4 ye a rs yo u n g er t han Hec t or . Tw e n t y ye a rs a g o Hec t ors a g e w a s 13 ye a rs m ore t han ha l f t h e a g e o f B r u ce . Ho w o l d a re t h ey n o w ?

Решение

Bruce^{'} s age is : 38

Hector^{'} s age is : 42

Шаги решения

Translate the problem into an equation:

x + 4 - 20 = 13 + \frac{1}{2} (x - 20)

Решите для

x, x + 4 - 20 = 13 + \frac{1}{2} (x - 20) : x = 38

Найдите age

Bruce^{'} s age is : 38

Hector^{'} s age is : 42

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