(x+2.5%20000)/(x+y+20000)=5%(y+15%20000)/(x+y+20000)=20%现有20kg原料,原料内BUOH含量15% AA含量2.5%,如果需要是原料里的BUOH含量变为20%、AA含量变为5% 请通过理论计算来确定需要加多少克BUOH和AA?
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(x+2.5%20000)/(x+y+20000)=5%(y+15%20000)/(x+y+20000)=20%现有20kg原料,原料内BUOH含量15%AA含量2.5%,如果需要是原料里的BUOH含
(x+2.5%20000)/(x+y+20000)=5%(y+15%20000)/(x+y+20000)=20%现有20kg原料,原料内BUOH含量15% AA含量2.5%,如果需要是原料里的BUOH含量变为20%、AA含量变为5% 请通过理论计算来确定需要加多少克BUOH和AA?
(x+2.5%20000)/(x+y+20000)=5%
(y+15%20000)/(x+y+20000)=20%
现有20kg原料,原料内BUOH含量15% AA含量2.5%,如果需要是原料里的BUOH含量变为20%、AA含量变为5% 请通过理论计算来确定需要加多少克BUOH和AA?
(x+2.5%20000)/(x+y+20000)=5%(y+15%20000)/(x+y+20000)=20%现有20kg原料,原料内BUOH含量15% AA含量2.5%,如果需要是原料里的BUOH含量变为20%、AA含量变为5% 请通过理论计算来确定需要加多少克BUOH和AA?
2.5%20000是啥意思,是0.025*20000吗
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x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简y(x+y)+(x+y)(x-y)-x^2
(x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
x^2(x-y)+(y-x)
x(x-y)2-(y-x)3
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简:{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
【(x-y)^2+(x+y)(x-y)】除以 2x
[(x-y)²+(x+y)(x-y)]除以2x
计算:y-x分之x+y+x-y分之y-y-x分之2x-y
[(x-y)^2-(x+2y)(x-2y)]/y
y=20000/x+2x的y的最小值
计算[2x^2-(x+y)(x-y)][(-x-y)(y-x)+2y^2]
(x+y)^2(x-y)^2-(x-y)(x+y)(x^2+y^2)分解因式