已知2x+5y+4z=15,7x+y+3z=14,求4x+2y+2z的值
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已知2x+5y+4z=15,7x+y+3z=14,求4x+2y+2z的值已知2x+5y+4z=15,7x+y+3z=14,求4x+2y+2z的值已知2x+5y+4z=15,7x+y+3z=14,求4x
已知2x+5y+4z=15,7x+y+3z=14,求4x+2y+2z的值
已知2x+5y+4z=15,7x+y+3z=14,求4x+2y+2z的值
已知2x+5y+4z=15,7x+y+3z=14,求4x+2y+2z的值
2x+5y+4z=15
7x+y+3z=14
42x+6y+18z=84
44x+11y+22z=99
所以4x+y+2z=9
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已知2x+5y+4z=15,7x+y+3z=14,求4x+y+2z=m
已知2x+5y+4z=15,7x+y+3z=14,求4x+2y+2z的值
已知2x+5y+4z=15,7x+y+3z=14,求4x+y+2z的值
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