Răspuns:
Explicație pas cu pas:
2x-13=5-(3x-7) => 2x-13=5-3x+7=> 2x-13=12-3x => 2x+3x=12+13 => 5x=25 => x=25/5=> x=5
2=-(2x+6)+2(4x-11) => 2=-2x-6+8x-22=> 2=6x-28=> 2+28=6x => 30=6x => x=5
x+1=-2(x+3)+3(x-2)+3 => x+1=-2x-6+3x-6+3 => x+1=x-12+3=> x+1=x-9 !vezi dacă ai copiat corect
-3(2x+5)+(7x-9)=-5-2(9-3x+24 !unde se închide paranteza?
5x-7(-2-5x)=13(-1-2x)-113 => 5x+14+35x=-13-26x-113 => 40x+14=-26x-126 => 40x-26x=-126-14 => 14x=-140=> x=-140/14=>x=-10