Write equation as you read the problem 32000 = 16000 + 16000*0.08*t, where t is the time (in years). From the equation 32000 - 16000 = 16000*0.08*t 16000 = 16000*0.08*t 1 = 0.08*t t = 1/0.08 = 12.5. ANSWER. In 12.5 years.