4(x-y+1)=3(1-y)-2 ① x/2-y/3=2②,用加减消元法解下列方程_数学解答

4(x-y+1)=3(1-y)-2 ① x/2-y/3=2②,用加减消元法解下列方程

人气：484 ℃　时间：2020-06-14 01:57:40

解答

4(x-y+1)=3(1-y)-2 ①,4x-4y+4=3-3y-2,4x-y=-6,y=4x+6
x/2-y/3=2②,3x-2y=12,3x-2(4x+6)=12,-5x=24,x=-4.8,y=-13.2