已知x+2y+3z=2 3x+y+2z=3 2x+3y+z=4求X+Y+Z的值
4个回答
x+2y+3z=2
3x+y+2z=3
2x+3y+z=4
三个式子相加,得:
6X+6Y+6Z=9
X+Y+Z=1.5
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