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人気のある Word Problems >

If the sum of a number and four is doubled, the result is one less than the number. Find the number.

解

I f t h e s u m o f a n u mb er an d f o u r i s d o u b l e d, t h e res u lt i s o n e l ess t han t h e n u mb er . F in d t h e n u mb er .

解

The number : - 9

解答ステップ

Represent the number with

x

A.T.Q.:

(x + 4) \cdot 2 = x - 1

x

を解く

(x + 4) \cdot 2 = x - 1 : x = - 9

The number : - 9

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