добрые люди х/2+х-1/4=х+2/9 (7х+3)-(5х+2) (х-1)+2(5+х). Created by лисизаса2015. algebra-ru

9 (7х+3)-(5х+2) (х-1)+2(5+х)...

лисизаса2015 @лисизаса2015

August 2022 1 48 Report

добрые люди
х/2+х-1/4=х+2/9
(7х+3)-(5х+2)
(х-1)+2(5+х)

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$\frac{x}{2}+ \frac{x-1}{4}= \frac{x+2}{9}|*36\\\\18x+9(x-1)=4(x+2)\\18x+9x-9=4x+8\\27x-4x=8+9\\23x=17\\x=17/23\\\\(7x+3)-(5x+2)=7x+3-5x-2=2x+1\\\\(x-1)+2(5+x)=x-1+10+2x=3x+9$

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