x=-1,y=2
4x-(2x+y+16)/2=-6y 2x+3y=7-x-2y
1个回答
相关问题
-
{2(x-y)/3-x+y/4=-1;6(x+y)-4(2x-y)=16
-
6(x+y)=4(2x-y)+16,2(x-y)/3=x+y/4-1
-
2(x-y)/3-x+y/4=-1和6(x+y)-4(2x-y+2)=16
-
解方程2(0.3X+4)-5(0.2x-7)=9 2(3y-4)+7(4-y)=4y 4(15-2x)-6x=16x-6
-
- {5x-2y=3{x+6y=7- {x+2y=0{3x+4y-6=0- {x-y=5{2x=15-3y- {3x-2
-
方程组计算(1)2x+3y=16 ,x+4y=13(2)7x-2y=3 ,9x+2y=-19(3) 3(x+y)-2(x
-
(1)y=x^2-7x=6 (2)y=3x^4+4x^3 (3)y=x^3-x^2-4x+4 (4)y=2x^2-x^4
-
(7x-2y)(3x-2y-1)-(4x+3y)(9x+6y)
-
2(x-y)/3-x+y/4=-1 6(x+y)-4(2x-y)=16 解这个方程组
-
1、(-3x-4y)·( )=9x²-16y² 2、如果x+y=6,xy=7,那么x²+y