shuxue:x+y=109,6/11x+5/9y=10,x=?y=?
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
x+y=5; x^y+y^x=17
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
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 联立方程 有的话
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x+y=3 x+2y=9 3/x+1=y y-x=3 y=2x-3 y-3x=1 2(x+1)-y=6 7x-5y=-9
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66