Sagot :
x+2=8 x+2-2=8-2 x=2
x-5=0 x-5+5=0+5 x=5
x-5=1 x-5+5=1+5 x=6
-3x=6 -3x/(-3)=6/(-3) x=-2
-2x=3 2x/(-2)=3/(-2) x=-3/2
3x+2=8 3x+2-2=8-2
3x/3=6/3 x=2
-2x+2=5 -2x+2-2=5-2
-2x/2=3/2 x=3/2
-5x+1=-3 -5x+1-1=-3-1
-5/5=-4/5 x=-4/5
3x-5=1 3x-5+5=1+5
3x/3=6/3 x=2
5x-1=-7 4x+1-1=5+1+2x
5x-2x=6+2x-2x
3x/3=6/3 x=2
4x+5=-7-2x 4x+5-5=-7-5-2x
4x=-12-2x
4x+2x=-12-2x+2x
6x/6=-12/6 x=-2