y=2x+62y=3x+8
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/29 05:41:29
y=2x+62y=3x+8
y=2x+6
2y=3x+8
y=2x+62y=3x+8
x=-4
y=-2
因为y=2x+6
所以2*(2x+6)=3x+8
所以x=-4
y=-2
y=2x+6
2y=3x+8
将y=2x+6 两同时乘2得2y=4x+12,
然后用2y=4x+12减去2y=3x+8
得x+4=0所以x=-4.然后将x代入任何一个方程后求得y=-2
x=-4
y=-2
x=-4
y=-2
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
12y(x-y)^2-8(x-y)^3=?
y=2x+62y=3x+8
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(x+y)(2x-3y)=?
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
9y=3x-(x-1),4(x+y)-(2x+4)=8y
3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8
x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x
已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y
已知x-y=3,求[(x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值
已知3x =2y 求x/x+y+y/x-y-y²/x²-y²
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
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
(x+y)/y=8/3则x/y=__ y/x-y=___