Answer:
2.4 dollars
12 x .20 = 2.4
The answer to your problem is A because you must add them altogether but i might be wrong im just trying to help you out
let x =the number
Step-by-step explanation:
81+x=3x-39
group like terms
81+39=3x-x
120=2x
120/2=2x/2
60=x
therefore x =60
x=7/2 x=7/3
