PV1 = 3.86*6.5
PV2 = 6.74*4.26
PVtotal = PV1 + PV2 = 25.09+28.7124 = 53.8024
if V final = 3.86 + 6.74 = 10.6
PVtotal = 53.8024
P*10.6 = 53.8024
P = 53.8024/10.6
P = 5.0756 atm
which makes sense, since it is between Pressures given
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