化简y=(10+x)(500-10x),
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化简y=(10+x)(500-10x),化简y=(10+x)(500-10x),化简y=(10+x)(500-10x),Y=-10(X+10)(X-50)=-10(X^2-10X-500)=-10X^
化简y=(10+x)(500-10x),
化简y=(10+x)(500-10x),
化简y=(10+x)(500-10x),
Y=-10(X+10)(X-50)=-10(X^2-10X-500)
=-10X^2+100X+5000
化简:3(x+y)+5=10y+x
化简y=(10+x)(500-10x),
y=(50-40+X)×(500-10X)当x=( ),y最大
若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是()?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8?(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8
(10x+y)-(10y+x)化简
(10x+y)-(10y+x)=27
(x+y)(x+y+10)+25=0 x-y=3.求x,y的值(x+y)(x+y-10)+25=0 x-y=3.求x,y的值
1.5(x+y)+3(x-y)=27(x+y)-3(x-y)=-62.x-y/7 - x+y/10 =1/22(x-y)-5(x+y)=3所谓细节决定成败,
方程组x-y=500① x+15%-(y-10%y)=950②
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
已知x-y=3 ,(x+y)(x+y+10)+25=0 求x,y的值
(x+y)(x+y+10)+25=0 x-y=3 求x,y的值
已知(x+y)(x+y-10)+25=0,且x-y=2,求x,y的值?
已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+y)的值
3:x=5:y,x比y少10,x=( ),y=( )
(10X+10Y)÷(X-Y)=40 X,Y各等于几,
已知x²+xy=10,y(x+y)=15,则x+y=
解方程组x+y=15 (x+15%x+y+10%y)=17