Use substitution to determine which number(s) from the set {9, 12, 14} make the equation 6x=72 true.
x = __
From the equation 6x=72, we can solve for x by dividing both sides by 6:
6x/6 = 72/6
x = 12
Therefore, the number 12 makes the equation true from the set {9, 12, 14}.