已知|x+2y+3|与(2x+y)*互为相反数,则x-y的值为马上要睡觉了!
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![已知|x+2y+3|与(2x+y)*互为相反数,则x-y的值为马上要睡觉了!](/uploads/image/z/1819551-39-1.jpg?t=%E5%B7%B2%E7%9F%A5%7Cx%2B2y%2B3%7C%E4%B8%8E%EF%BC%882x%2By%EF%BC%89%2A%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%E5%88%99x-y%E7%9A%84%E5%80%BC%E4%B8%BA%E9%A9%AC%E4%B8%8A%E8%A6%81%E7%9D%A1%E8%A7%89%E4%BA%86%21)
已知|x+2y+3|与(2x+y)*互为相反数,则x-y的值为马上要睡觉了!
已知|x+2y+3|与(2x+y)*互为相反数,则x-y的值为
马上要睡觉了!
已知|x+2y+3|与(2x+y)*互为相反数,则x-y的值为马上要睡觉了!
|x+2y+3|与(2x+y)²互为相反数
则x+2y+3=0
2x+y=0
解得x=1 ,y=-2
x-y=3