Suppose you invest a certain amount of money in account that earns 3% annual interest. You also invest that same amount + $2000 that earns 4% annual interest. If the total interest from both accounts at the end of the year is $535, how much has been invested in each account?
Set x is amount of money in first account => x + 2000 is money in second account. X*3% + (x+2000)*4% = 535 => x = (53500 - 8000) / 7 X = 45500 / 7 = 6500 => account #1 = x = 6500 Acc #2 = x + 2000 = 6500 + 2000 = 8500
