Answer:
It would be worth $635,62.
Step-by-step explanation:
The amount that you will have saved after t years is given by the following equation.
In which P(t) is the amount after t years, P(0) is the initial amount invested and r is the interest rate, as a decimal.
In this problem, we have that:
So
let x =the number
81+x=3x-39
group like terms
81+39=3x-x
120=2x
120/2=2x/2
60=x
therefore x =60