已知x:y:z=3:5:6,且2x-3y+3z+36,求3x+y-2z的值
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![已知x:y:z=3:5:6,且2x-3y+3z+36,求3x+y-2z的值](/uploads/image/z/5917339-19-9.jpg?t=%E5%B7%B2%E7%9F%A5x%3Ay%3Az%3D3%3A5%3A6%2C%E4%B8%942x-3y%2B3z%2B36%2C%E6%B1%823x%2By-2z%E7%9A%84%E5%80%BC)
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已知x:y:z=3:5:6,且2x-3y+3z+36,求3x+y-2z的值
已知x:y:z=3:5:6,且2x-3y+3z+36,求3x+y-2z的值
已知x:y:z=3:5:6,且2x-3y+3z+36,求3x+y-2z的值
设x:y:z=3:5:6=k,所以:x=3k,y=5k,z=6k
因为:2x-3y+3z=36,所以:6k-15k+18k=36
即:9k=36,所以:k=4
所以:3x+y-2z=9k+5k-12k=2k=8
x:y:z=3:5:6
设
x=3k
y=5k
z=6k
则
2x-3y+3z
=6k-15k+18k
=9k=36
解得k=4
3x+y-2z
=9k+5k-12k
=2k=8
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