9x+16y=95如何算出x=7,y=2
3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算
若线段x ,y 满足[2x-3y]*[3x+2y]=0 则x/y=?怎样算出2x-3y=0或3x+2y=0 当2x-3y
如何解方程组(x+2y)(x+2z)=-16,(y+2z)(y+2x)=8,(z+2x)(z+2y)=-7
设这间屋子有x张桌子,有y个人.3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 如何解
给出方程组x+y=7,2x+3y=19,编出应用题
5x+3y+2Z=25 6x+3y+z+25 怎么算出7X+3Y=25的?
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
已知4x=9y求(1)x+y/y (2)y-x/2x
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
若 X=y+x*0.08,y为已知数,怎样才能算出X的值?
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
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013