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-q=18-4p
q=-18+4p
2p+3q=2
2p+3(-18+4p)=2
2p-54+12p=2
14p=2+54
14p=56
p=56/14
p=4
q=-18+4p
q=-18+4(4)
q=-18+16
q=-2
10p-2q
=10(4)-2(-2)
=40+4
=44