1/2p + 7 = 3/4p + 9
9 - 7 = 3/4p - 1/2p
(1*2/2*2 = 2/4)
2 = 3/4p - 2/4p
2 = 1/4p
1/4p = 2
p = 2/1/4
p = 2*4/1
p = 6
Hope it helps :)
(
Your answer would be P= -8
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