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受欢迎的 Word Problems >

the 差集 between seven times a number and three times that same number is 20. find the number

解答

t h e d i ff ere n ce b e tw ee n se v e n t im es a n u mb er an d t h ree t im es t ha t s am e n u mb er i s 20. f in d t h e n u mb er

解答

The number : 5

求解步骤

Represent the number with

x

A.T.Q.:

7 x - 3 x = 20

求解

x, 7 x - 3 x = 20 : x = 5

The number : 5

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