4+5(2x+3)=204+10x+15=2010x=20-4-1510x=1x=0.1
4+5(2x+3)=204+10X+15=2010X=1X=0.1
4+5(2x+3)=2010x+19=2010x=1x=0.1
4+5(2x+3)=20解:4+10X+15=20 10X+19=20 10X=1 X=0.1