{5x-3y=7,-5x+y=-9
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(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
Y=x+3 7x+5y=9
y-x=3 7x+5y=-9
y=x+3 7x+5y=9
{y=x+3,7x+5y+9;
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3.5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3先化简,再求值;
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
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无
5x=3y,(2x+y)的平方=5x(x+y)+9
3x+5y-(x+y)=6 2(x+y)-3x=-7
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