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受欢迎的 Word Problems >

The sum of two numbers is 21. One number is 3 less than the other. What are the two numbers?

解答

T h e s u m o f tw o n u mb ers i s 21. O n e n u mb er i s 3 l ess t han t h e o t h er . Wha t a re t h e tw o n u mb ers ?

解答

The numbers : 9, 12

求解步骤

Represent the numbers with

x and y

:

number 1 : x

number 2 : y

A.T.Q.:

x + y = 21

x = y - 3

x + y = 21, x = y - 3 : x = 9, y = 12

The numbers : 9, 12

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