若x,y互为相反数,且(x+y+3)(x-y-2)=6,则x=______.
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若x,y互为相反数,且(x+y+3)(x-y-2)=6,则x=______.
![若x,y互为相反数,且(x+y+3)(x-y-2)=6,则x=______.](/uploads/image/z/17410189-13-9.jpg?t=%E8%8B%A5x%EF%BC%8Cy%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%EF%BC%8C%E4%B8%94%EF%BC%88x%2By%2B3%EF%BC%89%EF%BC%88x-y-2%EF%BC%89%3D6%EF%BC%8C%E5%88%99x%3D______%EF%BC%8E)
根据互为相反数的定义,得:x+y=0,y=-x,
把y=-x代入(x+y+3)(x-y-2)=6,得:3(2x-2)=6,
解得:x=2.
故填2.
把y=-x代入(x+y+3)(x-y-2)=6,得:3(2x-2)=6,
解得:x=2.
故填2.
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