{4x+8(x+y)=480 {4y+9(x+y)=480不要复制黏贴的
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解方程组{4x+8(x+y)=480,4y+9(x+y)=480
9y=3x-(x-1),4(x+y)-(2x+4)=8y
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
X+Y=9 8X+4Y=56
4x+8(x+y)=840 4y+9(x+y)=840
求x ,y 9x^2+4y^2-12x-8y+8=0
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=
4x+8(x+y)=480 4y+9(x+y)=480 = =
{4x+8(x+y)=480 {4y+9(x+y)=480不要复制黏贴的
计算:(x-y)^8÷(y-x)^4×(x-y)
化简(x+y)+(2x+1/2y)+(3x+2/3y)+(4x+3/4y)+...+(9x+8/9y)=?
化简:(-4x+3y)(-3y-4x)-(2x+3y)(8x-9y),其中,x=-3,y=-2
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 联立方程 有的话
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y
3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解