若|x-y+3|与|x+y-1999|互为相反数,求x+2y/x-y的值(要有过程)
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![若|x-y+3|与|x+y-1999|互为相反数,求x+2y/x-y的值(要有过程)](/uploads/image/z/2780351-71-1.jpg?t=%E8%8B%A5%7Cx-y%2B3%7C%E4%B8%8E%7Cx%2By-1999%7C%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%E6%B1%82x%2B2y%2Fx-y%E7%9A%84%E5%80%BC%EF%BC%88%E8%A6%81%E6%9C%89%E8%BF%87%E7%A8%8B%EF%BC%89)
若|x-y+3|与|x+y-1999|互为相反数,求x+2y/x-y的值(要有过程)
若|x-y+3|与|x+y-1999|互为相反数,求x+2y/x-y的值(要有过程)
若|x-y+3|与|x+y-1999|互为相反数,求x+2y/x-y的值(要有过程)
|x-y+3|与|x+y-1999|互为相反数
而|x-y+3|≥0,|x+y-1999|≥0
所以|x-y+3|=0,|x+y-1999|=0
x-y+3=0
x+y-1999=0
2x-1996=0
x=998
y=1001
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