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Phổ biến Word Problems >

A father is currently 21 years older than his son. In 8 years he will be twice as old as his son. What are their present ages?

Lời Giải

A f a t h er i s c u rre n tl y 21 ye a rs o l d er t han hi s so n . I n 8 ye a rs h e w i ll b e tw i ce a s o l d a s hi s so n . Wha t a re t h e i r p rese n t a g es ?

Lời Giải

Father^{'} s age is : 34

Boy^{'} s age is : 13

Các bước giải pháp

Translate the problem into an equation:

x + 8 = 2 (x - 21 + 8)

Giải

x, x + 8 = 2 (x - 21 + 8) : x = 34

Tìm age

Father^{'} s age is : 34

Boy^{'} s age is : 13

Ví dụ phổ biến

Franklin opened a savings account and deposited 500.00 as principal. The account earns 8% interest, compounded quarterly. What is the balance after 3 years?the hiệu of a number and 4 is no more than 8 Find two consecutive whole numbers that sqrt(31) lies between.702 is 10% of what number add the numbers 14 and 18 in the ternary number system