-18
38
58
14
Correct answer is D
-2p + r = 1.......(i)
2p + 3r = 0.......(ii)
r - 1 + 2p ........(iii)
2p + 3(1 + 2p) = 0
2p + 3(1 + 2p) = 0
2p + 3 + 6p = 0
3 - 8p = 0 → 8p = 3
p = 38
6 = 1 - 2 38
= 1 - 68
8−68 = 28
= 14
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