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受欢迎的 Word Problems >

If the denominator of 4/7 is increased by a number and the numerator is doubled, the result is 1. Find the number.

解答

I f t h e d e n o mina t or o f \frac{4}{7} i s in cre a se d b y a n u mb er an d t h e n u m er a t or i s d o u b l e d, t h e res u lt i s 1. F in d t h e n u mb er .

解答

The number : 1

求解步骤

Represent the number with

x

A.T.Q.:

\frac{4 \cdot 2}{7 + x} = 1

求解

x, \frac{4 \cdot 2}{7 + x} = 1 : x = 1

The number : 1

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