zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的 Word Problems >

Cody is twice as old as Evan. Three years ago the sum of their ages was 27. Find the age of Evan three years ago.

解答

C o d y i s tw i ce a s o l d a s E v an . T h ree ye a rs a g o t h e s u m o f t h e i r a g es w a s 27. F in d t h e a g e o f E v an t h ree ye a rs a g o .

解答

Eva n^{'} s age 3 years ago : 8

求解步骤

Translate the problem into an equation:

2 x - 3 + x - 3 = 27

求解

x, 2 x - 3 + x - 3 = 27 : x = 11

找到 Evan's age 3 years ago:

8

Eva n^{'} s age 3 years ago : 8

流行的例子

Seven less than twice a number is the same as one less than the number.Find the number.Five less than a number squared is 30 more than twice the number. Find the number.twenty less than one third of the number is 72.find the number Subtract a number from 7 and the result is 4 . Find that number.Twice a number reduced by 5 equals the number. Find the number.