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Réponse :
2x+1=23 2x=23-1 2x=22 x=22/2 x=11
-x+1=-7 1+7 = x x = 8
-9x-35=10 -35 - 10 = 9x 9x = -45 x = -45/9 x=-5
4x-8=8 4x = 8+8 4x = 16 x=16/4 x=4
4x-3=17 4x=17+3 4x=20 x=20/4 x=5
2x+2=4 2x=4-2 2x=2 x=1
-4x+6=-30 6+30 = 4x 4x = 36 x=36/4 x=9
3x-5=-11 3x = -11+5 3x= -6 x=-6/3 x=-3
6x-3=15 6x=15+3 6x=18 x=18/6 x=3
2x+8=16 2x=16-8 2x=8 x=8/2 x=4
8x-18=30 8x=30+18 8x=48 x=48/8 x=6
-x+20=31 20-31 = x x=-11
3x+30=0 3x = -30 x=-30/3 x=-10
-3x+40=10 40-10 = 3x 3x=30 x=30/3 x=10
-x-6=3 -6-3=x x=-9
6x-30=-6 6x = -6+30 6x=24 x=24/6 x=4
8x-8=40 8x =40+8 8x=48 x=48/8 x=6
-x-8=0 -8=0+x x=-8
3x-26-10 ???
-x+1=1 1-1=x x=0
-x+1=0 1=x x=1
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