Question

решите уравнение 
2-3(х+2)=5-2х

Answer 1

2-3(х+2)=5-2х

2-3х-6=5-2х

-3х+2х=5+6-2

-х=9

х=-9

 

Answer 2

$2-3(x+2)=5-2x$

 

$2-3x-6=5-2x$

 

$-4-3x=5-2x$

 

$3x-2x=-4-5$

 

$x=-9$

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$2-3cdot(-9+2)=5-2cdot(-9)$ (это проверка)

 

$2-3cdot(-7)=5+18$

 

$2+21=23$

 

$23=23$