6(2p + 3) + 6p = -37 + 7p
...multiply 6
12p + 18 + 6p = -37 + 7p
...simplify
18p + 18 = -37 + 7p
...subtract 18
18p = -55 + 7p
...subtract 7p
11p = -55
...divide 11
p = -5
