4x-3y=18 3x-4y=17 x/2+y/3=2 0.2x+4x-3y=18 3x-4y=17x/2+y/3=2 0.2x+0.3y=2.82x+y/3=3x-2y/8=3x+y+z=20 2x+y+z=42 x-5z=8错了。是x+y-z=20 2x+y+z=42 x-5z=8

问题描述:

4x-3y=18 3x-4y=17 x/2+y/3=2 0.2x+
4x-3y=18 3x-4y=17
x/2+y/3=2 0.2x+0.3y=2.8
2x+y/3=3x-2y/8=3
x+y+z=20 2x+y+z=42 x-5z=8
错了。是x+y-z=20 2x+y+z=42 x-5z=8