二分之一是单独的,他不包含绝对值里面,题目是已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y.看起来可能比较乱,题目为已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y

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二分之一是单独的,他不包含绝对值里面,题目是已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y.看起来可能比较乱,题目为已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y
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二分之一是单独的,他不包含绝对值里面,题目是已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y.看起来可能比较乱,题目为已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y
二分之一是单独的,他不包含绝对值里面,题目是已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y.
看起来可能比较乱,题目为已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y

二分之一是单独的,他不包含绝对值里面,题目是已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y.看起来可能比较乱,题目为已知x、y满足2/1 /x-y/+/1-y/=0,求7x-3y
已知,½|x-y|+|1-y| = 0 ,
因为,½|x-y| ≥ 0 ,|1-y| ≥ 0 ,
所以,½|x-y| = 0 ,|1-y| = 0 ,
可得:x-y = 0 ,1-y = 0 ,
解得:x = 1 ,y = 1 ,
所以,7x-3y = 4 .