X+Y=10009.93%x+25%y=100
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 10:17:53
X+Y=10009.93%x+25%y=100X+Y=10009.93%x+25%y=100X+Y=10009.93%x+25%y=10025X+25Y=250009.93X+25Y=10000上等式
X+Y=10009.93%x+25%y=100
X+Y=1000
9.93%x+25%y=100
X+Y=10009.93%x+25%y=100
25X+25Y=25000
9.93X+25Y=10000
上等式减下等式得
15.07X=15000
x=995.355
y=1000-995.355=4.645
0.0993X+0.25y=100(同是*4)
0.3972x+y=400(1式)
x+Y=100(2式)
2式-1式: 0.6028x=600
x=600/0.6028=995.355
y=1000-x=4.645
9.93%x+25%y=100两边都乘以100得出
9.93x+25y=10000 1)
x+y=1000两边都乘以25得
25x+25y=25000 2)
2)-1)得出
(25-9.93)x=25000-10000=15000
15.07x=15000
x=995.355(约等于)
y=1000-x=1000-995.355=4.645
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简 x / y(x+y) - y / x(x+y) =
X+Y=10009.93%x+25%y=100
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
y=x(x
(x+y)(x+y-10)+25=0,且x-y=3,求x,y
(x+y)(x+y-10)+25=0,且x-y=3,求x,y
x+x+x+x+y+y+y=56
已知X*X+Y*Y+6X-8Y+25=0 求(Y/X)+(X/Y)-2=?
x+x+x+y+y=6.4 y+y+y+x+x=7.1 怎么算?
二元函数f(x,y)=x+y/x-y,求f(y/x,x/y)
x-y/x+y=(x-y)²/x²-y²(x≠y)
(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
(12-2x)/X=(-16-2Y)/Y X^2+Y^2=25 Y
推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做.