解方程.100/(X+Y)+64/(X-Y)=9;80/(X+Y)+80/(X-Y)=9
解方程.100/(X+Y)+64/(X-Y)=9;80/(X+Y)+80/(X-Y)=9
解方程x*x+xy=y+y*y
80y+100y=x+60(y+10)+100(y+10) 这个方程怎么解?
80/(x+y) + 48/(x-y) =9 64/(x+y) + 96/(x-y) =12 怎样解,要过程,希望各大侠
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1
已知4x=9y求(1)x+y/y (2)y-x/2x
解方程 {x+y=20 x-y=12
解方程{2x+y=2、-x+y-5
解几个方程 1.x=3y 2x-5y=4 2.4x-3y=5 2x-y=2 3.11x-9y=12 -4x+3y=-5
解方程{2x-y=6 (x+2y)(2x-y)=96
解方程 8x+5y=9,3x-5y=1 3x-2y=5,5x+4y=12
解方程x²-2xy+y²=9,x²+4xy+4y²+x+2y=2 2x-1/y=