{4x+7y+7=3x+2y+4,5x+y+1=6x-1解方程租
{4x+7y+7=3x+2y+4,5x+y+1=6x-1解方程租
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y
请帮我做几道方程1、x+2y=0 3x+4y-6=02、3x+2y=-2 3x-y=43、6x+7y=-19 5y-6x
解方程:3x+2y/4=2x+y/5=x-y+1/6要详细过程
解方程:(1)4x+7y=10 (2)x+y-z=0 6x-11y+28=0 x+2y-z=3 2x-3y+2z=5
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
解二元一次方程{5X-2y=3 X+6y=7 {5x+4y=-3 2x-3y=8 {x+Y+Z=26 x-Y=1 2x-
解方程1、x-y=4 2x-y=7 2、1.2x-0.9y=0.4 3x-2y=1
方程2分之x+y+2分之x-y=7,4(x+y)-5(x-y)=2
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62
解方程组x/4+Y/4=2,x/6+y/3=2; X+2Y=1,2X-3Y=2; 4X-3Y=17,5X+Y=7