Paul multiplied the sum of three and a number by three. This result was equal to fifty four plus twelve times the opposite of the number. What was his number?
please explain and show work.
3(3 + n) = 54 + 12(-n)
9 + 3n = 54-12n
15n = 45
n = 3
please explain and show work.
9 + 3n = 54-12n
15n = 45
n = 3