简易方程 (1.)5y-6+3(y-4)=2y+6 (2.)3(3x+1)÷(x+12)=4 (3.)(8x+11)÷3
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
数学题……555{(3x+y)(3x-y)-(x-5y)(5x-y)-(x-2y)²÷(-4x),x=-2.y
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
解方程:(1)4x+7y=10 (2)x+y-z=0 6x-11y+28=0 x+2y-z=3 2x-3y+2z=5
(Y-2)/3=X(Y-4)/5=X(Y-6)/7=X(Y-8)/9=XY/11=X求Y和X是多少?方程.我没学过.我自
用代入法解方程2(x-y)/3-(x+y)/4=-1① 6(x+y)-4(2x-y)=16②
1 .{5X-2y=3 X+6y=7 2.{5x+4y=-3 2x-3y=8 3.{x+Y+Z=26 x-Y=1 2x-
解方程(3x+2y)/4=(2x+3y)/5=(x-1)/6
解方程:3x+2y/4=2x+y/5=x-y+1/6要详细过程
求方程x+2y-3x=4,3x-2y+x=6,3x+2y-5x=8的解
1.解下列方程(1)(x+y=-2(x+z=13(y+z=1(2)(x-y-z=-1(3x+5y+7z=11(4x-y+
用代入消元法解下列方程 1.y-x=-8,x+3y+4=0 2.3x=4y,4x-5y=2 3.2(x-1)=y+1,5