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D: 3p + 5x = 22
S: 2p - 3x = 2
2p - 3x = 2
2p = 2 + 3x
p = (2 + 3x)/2
3p +5x = 22
3(2 + 3x)/2 + 5x = 22
(6 + 9x)/2 + 5x = 22
(6 + 9x + 10x)/2 = 22
6 + 19x = 44
19x = 38
x = 2
p = (2 + 3x)/2
p = (2 + 6)/2
p = 8/2
p = 4