3x-2y=11 2x+3y=16

来源：学生作业帮助网编辑：六六作业网时间：2025/01/20 16:30:06

3x-2y=112x+3y=163x-2y=112x+3y=163x-2y=112x+3y=163x-2y=11(1)2x+3y=16(2)(1)×3+(2)×29x+4x=33+3213x=65所以

3x-2y=11 2x+3y=16
3x-2y=11 2x+3y=16

3x-2y=11 2x+3y=16
3x-2y=11 (1)
2x+3y=16 (2)
(1)×3+(2)×2
9x+4x=33+32
13x=65
所以
x=5
y=(3x-11)/2=2

这个是一元二次方程，不是很好做吗？x=5，y=2

第一个式子乘以3，得9x-6Y=33，第二个式子乘以2，得4X+6Y=32，两个式子相加,13X=65，求出X，带入任意一个式子得出Y

3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) (x+y)(2x-3y)=? 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值已知3x =2y 求x/x+y+y/x-y-y²/x²-y² (x+y)(x+2y)(x+3y)(x+4y)=-40y的值为根号11 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值根据3（x+y)-2(x-y)=11,4(x+y)+3(x-y)=9可得出x+y= ,x-y= {(x+2)^2-(y-3)^2=(x+y)(x-y) {x-3y=2 (3x-y)^2+(3x+y)(3x-y),x=1,y=-2 2（x+y)-3(x-y)=3 ,4(x+y)+3(x-y)=15 x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2