如果(3x²-2)-(3x²-y)=-2,那么代数式(x+y)+3(x-y)-4(x-y-2)的值是
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![如果(3x²-2)-(3x²-y)=-2,那么代数式(x+y)+3(x-y)-4(x-y-2)的值是](/uploads/image/z/2536097-41-7.jpg?t=%E5%A6%82%E6%9E%9C%EF%BC%883x%26%23178%3B-2%EF%BC%89-%EF%BC%883x%26%23178%3B-y%EF%BC%89%3D-2%2C%E9%82%A3%E4%B9%88%E4%BB%A3%E6%95%B0%E5%BC%8F%EF%BC%88x%EF%BC%8By%EF%BC%89%EF%BC%8B3%EF%BC%88x-y%EF%BC%89-4%EF%BC%88x-y-2%EF%BC%89%E7%9A%84%E5%80%BC%E6%98%AF)
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如果(3x²-2)-(3x²-y)=-2,那么代数式(x+y)+3(x-y)-4(x-y-2)的值是
如果(3x²-2)-(3x²-y)=-2,那么代数式(x+y)+3(x-y)-4(x-y-2)的值是
如果(3x²-2)-(3x²-y)=-2,那么代数式(x+y)+3(x-y)-4(x-y-2)的值是
很高兴为您解答.
∵3x²-2-(3x²-y)=y-2=-2
∴y=0
∴(x+y)+3(x-y)-4(x-y-2)
=2y+8=8
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