Explanation:
Zhang invests $2,600 in two different accounts. The first account paid 11%, the second account paid 5% in interest. At the end of the first year he had earned $220 in interest. How much was in each account?
11% = 0.11
in account 1: $220/0.11 = $2,000
in account 2: $2,600 - $2,000 = $600
$2,000 At 11%
$600 At 5%