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19 June, 23:59

If 9p = 3a + 1 and 7p = 2a - 3, then which of the following expresses p in terms of a

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  1. 20 June, 00:41
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    Ans=

    9p-7p=3a+1 - (2a-3)

    =2p=3a+11-2a+3

    =2p=a+4

    =p = (a+4) / 2

    Ans is (a+4) / 2

    -Jing
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