人教版五年级上册分宜县凤阳中心学校 敖霞梅3x+20 110 解:3x=110-20 3x=90 x=903 x=30解:3x+20-20=110-20 3x=90 3x3=903 x=30或哪种简单?6x3.16 64.2 解:6x+18.6=64.26x+18.6-18.6=64.2-18.6 6x=45.6 6x6=45.66 x=7.6解:6x+18.6=64.2 6x=64.2-18.6 6x=45.6 x=45.66 x=7.6 或哪种简单?6x8.31.9 解:6x=1.9+8.3 6x=10.2 x=10.26 x=1.7解:6x-8.3+8.3=1.9+8.3 6x=10.2 6x6=10.26 x=1.7或哪种简单?5x49 25 解:5x-36=25 5x=25+36 5x=61 x=615 x=12.2解:5x-36+36=25+36 5x=61 5x5=615 x=12.2或哪种简单? 101.5x25解:1.5x=25-10 1.5x=15 x=151.5 x=10解:10+1.5x-10=25-10 1.5x=15 1.5x1.5=151.5 x=10或哪