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Sagot :

7(x+9)=7x+63
9(y-3)=9y-27
-3(z-5)=-3z+15
4(3+5x)=12+20x
6(9y-8)=54y-48
-5(5-7z)=-25+35z
1) 7x+63
2) 9y-27
3) -3z-15
4)  12+20x
5) 54y-48
6) -25-(-35z)

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