реши уравнения: 1 2/7 + 2 1/3 х + 3/14 + х = 9. Created by Даша906. matematika-ru

14 + х = 9...

Даша906 @Даша906

June 2022 1 10 Report

реши уравнения: 1 2/7 + 2 1/3 х + 3/14 + х = 9

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UmbertoVargas

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$1 \frac{2}{7} +2 \frac{1}{3}x+ \frac{3}{14} +x=9 \\ \\ 
 \frac{9}{7} + \frac{7x}{3}+ \frac{3}{14}+x=9 \\ \\ 
 \frac{7x+3x}{3} = \frac{9*14-3-9*2}{14} \\ \\ 
 \frac{10x}{3} = \frac{105}{14} \\ \\ 
140x=315 \\ \\ 
x=2,25$

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