2(x-y)∕3=x+y∕4-1,6(x+y)=4(2x-y)+16（解方程组,
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2(x-y)∕3=x+y∕4-1,6(x+y)=4(2x-y)+16（解方程组,2(x-y)∕3=x+y∕4-1,6(x+y)=4(2x-y)+16（解方程组,2(x-y)∕3=x+y∕4-1,6(x
2(x-y)∕3=x+y∕4-1,6(x+y)=4(2x-y)+16（解方程组,
2(x-y)∕3=x+y∕4-1,6(x+y)=4(2x-y)+16（解方程组,
2(x-y)∕3=x+y∕4-1,6(x+y)=4(2x-y)+16（解方程组,
2(x-y)∕3=x+y∕4-1 => 4x+11y=12
6(x+y)=4(2x-y)+16 => 2x-10y=-16
解得：x=-28/31
y=44/31
第一个方程中的x+y不带括号么
由一式得：8x-8y=3x+3y-12
5x-11y=-12(3)
由二得：6x+6y=8x-4y+16
-2x+10y=16(4)
(3)x2得：10x-22y=-24(5)
(4)x5得：-10x+50y=80(6)
(5)+(6)得： 28y=56
y=2
把y=2...
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由一式得：8x-8y=3x+3y-12
5x-11y=-12(3)
由二得：6x+6y=8x-4y+16
-2x+10y=16(4)
(3)x2得：10x-22y=-24(5)
(4)x5得：-10x+50y=80(6)
(5)+(6)得： 28y=56
y=2
把y=2代入（3）：5x-22=-12
5x=10
x=2
所以原方程组的解为{x=2
{y=2
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{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
解二元一次方程组：3(x+y)-4(x-y)=4,x+y/2+x-y/6+1x+y/2+x-y/6+1=1
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
（x+y）/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
2(x-y)∕3=x+y∕4-1,6(x+y)=4(2x-y)+16（解方程组,
{x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0
求值域 1,y=(x+2)/(x*x+3x+6) 2,y=3x/(x*x+4)
若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7
x+y+2(-x-y+1)=3(1-y-x)-4-(y+x-1),x+y=?
初二上学期方程题 4x+y=5 5x+4y=63x-2y=1 2x+3y=13x-2y=7 7x+5y=32x+3y=17 2x-y=-4x+5y=6 2x+y=23x-6y=4 3x+2y=52x+y=73x-4y=53x+y=1x-2y=-1x+y=42x+3y=92x-3y=74x+5y=3x+y=20004x+6y=90003x+5y=113x-2y=42x+3y=215x-2y=5x+y=54x+3y=182x+3y=16x+4y=132x+3y=40x
[(3x+4y)]^2-3x(3x+4y)]/(--6y),其中x=1,y=3
2(x-y)/3-(x+y)/4=-1 (1) 6(x+y)-4(2x-y)=16 (2)
解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16
解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16