Use the formula for Simple Interest:
I = Pin
Where: I = simple interest
P = principal amount of money initially borrowed
i = interest rate
n = number of interest periods.
So we will just substitute: and find P:
I = Pin
12,000 = P(0.07)(3)
(12000)/(0.07X3) = P
57,142.86 = P
57, 143 = P money borrowed by Errol ...ANSWER