您好。5(x+3)=205x +15=205x=5x=1谢谢!
解:5(x+3)=20 5x+15 =20 5x=5 x=1
5(X+3)=20 5x+15=20 5x=5 x=1
x+3=20/5x+3=4x=4-3x=1
5(x+3)=20 (x+3)=4 x=4-3 x=1