x-(40%+126)=25%x怎么解
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x-(40%+126)=25%x怎么解
x-(40%+126)=25%x怎么解
x-(40%+126)=25%x怎么解
先移项:X-25%*X=40%+126
提取同类项:X*(1-25%)=0.4(40%化为小数形式)+126
0.75(75%化为小数形式)*X=126.4最后:X=126.4/0.75=168.5334
其实百分数化为分数形式更好计算:
接提取同类项那步:3/4*X=126+2/5
3/4*X=632/5
最后:X=(632/5)/(3/4)=2528/15