加减消元法 3x-4y=-11 、4x-2y=-3 x/2-Y+1/3=1、3X+2Y=10
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
用加减消元法(1)2x-y=8 2x+5y=-4 (2)2x+5y=17 2x-3y=1 (3)x-y=5 2x+3y-
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
{x/3+y/4=1 x/3-y/2=1 用加减消元法解方程组
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
5x-3y=2,4y+2x=6用加减消元法
4(x+2y)=12,3x=5+2y(加减消元法)
加减消元法 2x-y-2=0,4x-3y-8=0
{2x+y=1,5x+2y=3,加减消元法,求过程
{x-2y=9 {3x-2y=-1 (用加减消元法)
方程组3x+2y=5 5x+4y=7 j加减消元法