X+0.1X+(100-2X)*0.5=54.2
x+0.1x+50-x=54.2
0.1x=54.2-50
0.1x=4.2
x=4.2÷0.1
x=42
X+0.1X+(100-2X)*0.5=54.2解解更健康
X+0.1X+(100-2X)*0.5=54.2解解更健康
數(shù)學(xué)人氣:893 ℃時間:2020-03-30 23:07:45
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