2x+Y+3z=23,x+4y+5z=36,求X+2Y+3z~
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2x+Y+3z=23,x+4y+5z=36,求X+2Y+3z~
![2x+Y+3z=23,x+4y+5z=36,求X+2Y+3z~](/uploads/image/z/16106074-34-4.jpg?t=2x%2BY%2B3z%3D23%2Cx%2B4y%2B5z%3D36%2C%E6%B1%82X%2B2Y%2B3z%7E)
2x+Y+3z=23...(1)
x+4y+5z=36...(2)
(2)*2-(1)
7Y+7Z=49
Y+Z=7
x+4y+5z=36=X+2Y+3Z+2(Y+Z)
X+2Y+3Z=36-2*7=22
x+4y+5z=36...(2)
(2)*2-(1)
7Y+7Z=49
Y+Z=7
x+4y+5z=36=X+2Y+3Z+2(Y+Z)
X+2Y+3Z=36-2*7=22
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