设P=2y－2, Q=2y+3, 有2P－Q=1, 则y的值是 �

设P=2y－2, Q=2y+3, 有2P－Q=1, 则y的值是 ( )

A. 0.4 B. 4 C. －0.4 D. －2.5

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设P=2y－2, Q=2y+3, 有2P－Q=1, 则y的值是 �

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