Question 1170745
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An amount 2x invested at 5% is the same as an amount x invested at 10%.<br>
So the problem is equivalent to investing equal amounts at 10% and 12%.<br>
That means the average interest rate is 11%.<br>
$4840 interest at 11% means the total investment was $4840/0.11 = $44,000.<br>
So the investment was equivalent to $22,000 at 10% and $22,000 at 12%.  But since the interest rates were actually 5% and 12%, the amounts invested at each rate were<br>
ANSWERS: $44,000 at 5% and $22,000 at 12%.<br>
CHECK: .05(44000)+.12(22000) = 2200+2640 = 4840<br>