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Sagot :

3(5+3x)-(x-3)=0
15+9x-x+3=0
8x+18=0
x=-18/8=-9/4

3(5+3x) - (x-3)=0

15 +9x -x+3 = 0

8x + 18= 0

8x = -18

x = -18/8

x = -9/4

 

 

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