Réponse:
a. 8x+3=0
8x=-3
x=-3/8
b. 2x-9=0
2x=9
x=9/2
c. 49-7x=0
49=7x
49/7=x
d. -6x-5=0
-6x=5
x=5/-6
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Réponse:
a. 8x+3=0
8x=-3
x=-3/8
b. 2x-9=0
2x=9
x=9/2
c. 49-7x=0
49=7x
49/7=x
d. -6x-5=0
-6x=5
x=5/-6