4x+3y=6,2x+y-4=0
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/06 09:43:53
x}N@_npbyz`^!&4҃O`R*افxb4^`ߌ{6o[sv)of{[4|aEByWM(&p6LJ
,*Dh8gƱ;T|W6l&c>CX
ƱX]*?AYͥbyUĢ߅7$Wݩ#ʇ?Nė
4x+3y=6,2x+y-4=0
4x+3y=6,2x+y-4=0
4x+3y=6,2x+y-4=0
4x+3y=6.(1)
2x+y-4=0.(2)
由(2)得
y=4-2x
代入(1)得
4x+12-6x=6
2x=6
x=3
则
y=4-2x=4-6=-2
解得
x=3
y=-2
第二个式子两边同乘2,再减去第一个式子即求X,再将X带入一个式子解Y即可
4x+3y=6(1)
2x+y-4=0(2)
化简(2)得
2x+y=4(3)
(1)-(3)x2
y=-2
带入(1)得x=3
所以x=3,y=-2
希望帮到你~
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=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
{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
x^2+4y^2-6x+4y+10=0,求x^4-y^4/(x+2y)(x-2y)*x+2y/xy^2+y^3除以(x^2+y^2/y)^2的值
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
化简求值:已知x、y满足:x^2+y^2-4x+6y+13=0 求代数式 的值.(3x+y)^2-3(3x-y)(x+y)-(x-3y)(x+3y)急用!
如果A={(x,y)|x,y+2>0},B={(x,y)|2x+3y-6>0},C={(x,y)|x-4
常微分方程的通解dy/dx=(x-y+1)/(x+y-3)y^4=2y^n+y=0y''+6y'+9y=e^(-3x)y''+y'-2y=4e^(2x)
已知x、y满足x2+y2-4x+6y+13=0 求代数式(3x+y)2-3(3x-y)(x+y)-(x-3y)(x+3y)已知x、y满足x^2+y^2-4x+6y+13=0 求代数式(3x+y)^2-3(3x-y)(x+y)-(x-3y)(x+3y)的值
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
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
已知x^2+y^2+13-4x+6y=0,求(2x-y)^2-2(2x-y)(x+2y)+(x+2y)^2
(x-y)的4次方/(y-x)的3次方+(x-y)0的次方*(y-x)+(-x-y)7次方/(x+y)6次方=
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无