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Sagot :

A: -2+x=5
-2+2+x=5+2
x=7

B: x+9=16
x+9-9=16-9
x = 7

C: 6x = 15
6x/6= 15 / 6
X= 2,5

D : -5x = 24
-5x/-5 =24/-5
X = 24/-5

E: 4x+ 3x = 49
7x=49
7x/7 =49/7
X=7

F: -2x+7x =36
5x=36
5x/5=36/5
X=7,2

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