0.1x+0.3y = 0.15(x+y) 0.1x+0.3y+0.2×300 = 0.18×(x+y+300) x=?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/29 21:38:31
0.1x+0.3y = 0.15(x+y) 0.1x+0.3y+0.2×300 = 0.18×(x+y+300) x=?y=?
![0.1x+0.3y = 0.15(x+y) 0.1x+0.3y+0.2×300 = 0.18×(x+y+300) x=?](/uploads/image/z/16213743-63-3.jpg?t=0.1x%2B0.3y+%3D+0.15%28x%2By%29+0.1x%2B0.3y%2B0.2%C3%97300+%3D+0.18%C3%97%28x%2By%2B300%29+x%3D%3F)
根据0.1x+0.3y+0.2×300 = 0.18×(x+y+300)化简得0.1x+0.3y+60=0.18×(x+y)+54
又0.1x+0.3y = 0.15(x+y)
所以0.15(x+y)+60=0.18×(x+y)+54
化简得(x+y)=200
由0.1x+0.3y = 0.15(x+y)得x=3y
所以解得x=150,y=50
又0.1x+0.3y = 0.15(x+y)
所以0.15(x+y)+60=0.18×(x+y)+54
化简得(x+y)=200
由0.1x+0.3y = 0.15(x+y)得x=3y
所以解得x=150,y=50
二元函数f(x,y)=x+y/x-y,求f(y/x,x/y)
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
x+y=5; x^y+y^x=17
因式分解下列式子:x(x-y)+y(y-x)=?
根据x+x+x+y+y=54,x+x+y+y+y=56,求出x.y的值
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
) y=cos(x-y)
(x+y-z)(x-y+z)=
(x-y)(x+y)(xx-yy)=?
y'-2y=(e^x)-x
y'+2y/x=x通解