1-2x=x 2x+5=3x-39x=7x-68y=4y-1若x/-2=2y/3,则x=( )y3-1/3 x =4两边
1个回答
1=3x,x=1/3
5+3=3x-2x,x=8;
9x-7x=-6,x=-3;
8y-4y=-1,y=-1/4;
3-4=1/3x,x=-3;
相关问题
(1)﹛2x-y=5 (2) 4x-y=1 (3)5x+y=2 7x-3y=20 y=2x+3 x-3y=4 (4)3x
(3x+2y)(3x-2y)-(x-3y)(3x+y) 2(2x-1)(2x+1)-5x(-x+3y)+4x(-4x^2
若x-y=1,x3-y3=2,则x4+y4=______,x5-y5______.
1.x+1/2=y+3/4=x+y/5,则3x+2y+1/x+2y+3=?
(1)7x+3y=18 2x+3y=13 (2)5x+2y=7 2x+y=1 (3)3x+4y=5 4x+5y=6如题
【4】(-2x+3y)(-2x-3y) 【5】(-1/4x-2y)(-1/4x+2y) 【6】x^2+(y-x)(y+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
下列函数:1.y=-3x+4 2.y=7/5x 3.y=1+2/x 4.y=x²+2 5.y=x-1/2 其中
(1) (3x-2y)(y-3x)-(2x-y)(3x+y) (2) (3x+2y+4)(5x-2y-1) 计算