2(x+1.3)=18=2x+2x1.3=18=2x+2.6=182x=18-2.62x=15.4x=7.7
2(x+1.3)=18怎么解=2x+2x1.3=18=2x+2.6=182x=18-2.62x=15.4x=7.7
解:2(X十1.3)=182x十2X1.3=182X十2.6=182X=18一2.62X=15.4X=7.7