x+5x=5y 300+4x=4y-100 方程怎么解
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5x-4y(y-x)=?
y=|-x.x+4x+5|
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
(5x+3y)(3y-5x)-(4x-y)(4y+x)=
x*x+2x+y*y-4y+5=0 x= y=
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
解两道二元一次方程组.1.y=2x 10x+y=(10y+x)-362.x+y=5 50x*4=300y
解两道二元一次方程组..y=2x 10x+y=(10y+x)-362.x+y=5 50x*4=300y
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值
x+y/y=5/4,则x/y=----------------
已知:4x = 5y,求(x+y) :y
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
x-y+5x-4x= ?x-y+5x-4x= ?
x+5y=4,2x+10y=?
3(2X+Y)+(2(2x-Y)=6 (8X+4y)-(10X-5Y)=2