Let 'n' represent the unknown number being multiplied.
3n - 7 = 14
Add 7 to both the 7 and the 14.
3n = 21
Divide both sides by 3.
n = 7
Check your work by substituting 7 into the 'n' place in order to get a true statement.
3(7) - 7 = 14
21 - 7 = 14
14 = 14
