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2(x-1)-5x=18-7x
Ajutoorr , dau coronitsa , repedeeee


Răspuns :

2x-2-5x=18-7x
-3x+7x=18+2
4x=20 => x=5

Sper ca te-am ajutat!  :) 
2(x-1)-5x=18-7x⇒
2x-2-5x=18-7x⇒
2x-5x+7x=18+2⇒
4x=20⇒
x=20/4⇒
x=5