bonsoir
x-4=-10
x=-10+4
x=-6
x/4=-2
x=-2*4
x=-8
5x-1=4
5x=4+1
5x=5
x=5/5
x=1
8-3x=-1-6x
-3x+6x=-1-8
-3x=-9
x=9/3
x=3
2(x-3)=5(3-x)
2x-6=15-5x
2x+5x=15+6
7x=21
x=21/7
