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
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