解方程.①2x+3×0.9=24.9②120%x+x=44.
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解方程.
①2x+3×0.9=24.9
②120%x+x=44.
①2x+3×0.9=24.9
②120%x+x=44.
①2x+3×0.9=24.9,
2x+2.7=24.9,
2x+2.7-2.7=24.9-2.7,
2x=22.2,
2x÷2=22.2÷2,
x=11.1;
②120%x+x=44,
(1.2+1)x=44,
2.2x=44,
2.2x÷2.2=44÷2.2,
x=20.
2x+2.7=24.9,
2x+2.7-2.7=24.9-2.7,
2x=22.2,
2x÷2=22.2÷2,
x=11.1;
②120%x+x=44,
(1.2+1)x=44,
2.2x=44,
2.2x÷2.2=44÷2.2,
x=20.
解方程.①2x+3×0.9=24.9②120%x+x=44.
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