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Sagot :

A) 2x-9=8x+3
2x= 8x+3+9
2x= 8x+12
2x-8x=12
-6x=12
X= 12/-6
X= -2

B) 5-2x= x
5= 3x
X= 3/5x

C) 3x+5=4x-7
3x= 4x-12
-1x= -12
X= 12


Voilà ton exercice des équations
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