Vous pouvez m’aider s’il vous plaît
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Bonsoir;
8x=20
x= 20/8 =10/4 = 5/2 = 2,5
-12x =36
x = -36/12 = -3
x+7=20
x = 20-7
x= 13
x-12= 3,5
x = 3,5+12 = 15,5
x = 4,2-1,6 =2,6
x = 14+48 = 62
2x = 20-7
2x = 13
x=13/2 = 6,5
4x = 88+12
4x = 100
x = 100/4
x = 25
13-6 = 2,3x
7 = 2,3x
x = 7/2,3
2,5x = 50
x = 50/2,5
x = 20