4x-3y=5① 2x+3y=1②用加减消元法解方程.

用加减消元法解方程：1-0.3(y-2)=（x+1）/5①(y-1)/4=(4x-3)/20-0.4②用加减消元法解方程! 4x-3y=5① 2x+3y=1②用加减消元法解方程. 加减消元法解方程组3x+y=-1①,4x+2y=1② {4x-3y=5,2y-4x=1用加减消元法解 {4x-3y=5,2y-4x=1用加减消元法解 x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组 用加减消元法解二元一次方程组：①[(x+y)/2]+[(x-y)/3]=5②[(x+y)/2]+[(x-y)/3]=-1 具体一点! 用加减消元法解个二元一次方程组 ：{2x-5y=7 ① {2x+3y= -1 ② 一、{5x-6y=11,① 8x-9y=13,②加减消元法 二、{3x+5y=19,①{3x-5y=-1,②加减消元法{2x-y=5,① 3x-4y＝2,②加减消元法 ｛x/3+y/4=1 x/3-y/2=1 用加减消元法解方程组 用加减消元法解方程组{4x-5y=5,2x+3y=-25 5x-3y=2,4y+2x=6用加减消元法 用加减消元法解方程组 3(x-1)=y+5 2(y+1)=x+1 5X+4Y=140,3X+2Y=76用加减消元法求解 2x-5y=-21 4x+3y+23 用加减消元法解 用加减消元法解下列方程组①2x+y=2,-x+y=5 ②x-2y=3,x+2y=6 (3x+2y)/4=(2x+y+2)/5=-(x+5y)/3 用加减消元法 3x+2y=1,4x-2y=13 用加减消元法解 求x与y