3p + 18 = 5p + 4
Subtract 4 from both sides
3p + 14 = 5p
Subtract 3p from both sides
14 = 2p
Divide both sides by 2
7 = p
Note : For presentation purposes the unknown or variable is normally put as the subject of the equation. The answer is then presented as p = 7.
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3p+5+p = -23 3p+p = -23-5 4p = -28 p = -7
-9p + 6p = -3p
3p = 2p + 12subtracting 2p from both sidesp = 12 ■
p = -1
16p + 6q - 3p - 8q = (16p - 3p) + (6q - 8q) = 13p -2q