6x=3x-7 3x=-7 x=-7/3 5=7 2x 2x=-2 x=-1 y-1/2=1/2y-2 2y-1=y-4 y=-3 11/9x 2/7=2/9x-5/7 11/9x-2/9x=-2/7-5/7
9x^2+6x-8=0 求9x^2+y^2+6x-4y+7
1个回答
相关问题
-
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
-
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y
-
1.(x+4)(x-7)+10 2.1-6xy^3+9x^2y^6 3.(9x^2-4y^2)-(3x+2y) 4.(m
-
已知x^2-2xy+2y^2+6x-6y+9=0求x y
-
2x-3y=8 4x+6y=9
-
x^2+6*x*y+9*y^2+3*x+9*y-4=0表示的图形
-
(7x-2y)(3x-2y-1)-(4x+3y)(9x+6y)
-
1:7x+2y-z=7 2:6x-y+z=7 3:4x+3y+z=9 1:9x+4y+z+10 2:-9X+2y+3z=
-
已知x^2+9y^2-8x+6y+17=0,求1/x-1y
-
x^2-6x+9;9(x+y)^2-6(x+y)+1