X+Y=18,Y+Z=12,X+Z=8. 帮忙算下XYZ.
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X+Y=18,Y+Z=12,X+Z=8. 帮忙算下XYZ.
![X+Y=18,Y+Z=12,X+Z=8. 帮忙算下XYZ.](/uploads/image/z/19223176-40-6.jpg?t=X%2BY%3D18%2CY%2BZ%3D12%2CX%2BZ%3D8.+%E5%B8%AE%E5%BF%99%E7%AE%97%E4%B8%8BXYZ.)
X+Y=18
Y+Z=12
X+Z=8
2(X+Y+Z)=38
X+Y+Z=19
X=7
Y=11
Z=1
Y+Z=12
X+Z=8
2(X+Y+Z)=38
X+Y+Z=19
X=7
Y=11
Z=1
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