Bonjour,je dois résoudre les équations suivantes : a. 2+(x+3)=5x                   b.6(-y+9)=y+10

c.5+(2x+1)=4-4x                d.2(a-1)=-5+(3a-9)

e.1-9(b+6)=-2(4-3b)            f.-(5-x)=-6(x-1)

merci beaucoup d'avance.
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