用加减消元法解答0.6x-0.4y=1.10.2x-0.4y=2.3
5x-3y=2,4y+2x=6用加减消元法
{x-2y=9 {3x-2y=-1 (用加减消元法)
2x+y=4,x+2y=5解方程组(用加减消元法)
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
{x-y=3 2x+3(x-y)=11 用加减消元法解方程组
用加减消元法解下列方程组:2x+y=15 x+2y=18 5x+y=3 x+5y=2
能用加减消元法解么?x=50(y+0.4) x=75(y-0.4) 解方程组,
4(x+2y)=12,3x=5+2y(加减消元法)
解方程组{5x-3y=2 2x-3y=-10 加减消元法.
{2x+y=1,5x+2y=3,加减消元法,求过程
加减消元法 2x-y-2=0,4x-3y-8=0
方程组3x+2y=5 5x+4y=7 j加减消元法