作业帮x+y=100 18x+10y=1500咋解?快速
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x+y=100 18x+10y=1500咋解?快速
x+y=100 18x+10y=1500咋解?快速
x+y=100 18x+10y=1500咋解?快速
x+y=100
10x+10y=1000
18x+10y=1500
18x+10y-10x-10y=1500-1000
8x=500
x=500/8
y=100-500/8=300/8
10x+10y=1000
18x+10y=1500
方程2-方程1 8x=500 x=62.5
y=37.5
X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y)
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
328-y/y x 100％=-18％
化简 x / y(x+y) - y / x(x+y) =
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
100x+10y+1z=18x+18y+18x 求：x、y、z各是几.
x+y=100 18x+10y=1500咋解?快速
x+y=100 18x+10y=1500咋解?快速
x+y=100 2×16x=18y
{x-y=100 {12%x-10%y=100
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=?
10X+Y+1/3Z=10Y+X 10X+Y+2/3Z=100X+Y
解方程组：2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
y=x(x
x+y=20,x-y=10,y=
y+10x=x+y+9 10y+x=y+10x+27