Question 1158613
<pre>
RATE%      VARIABLE OR QUANT.              EARN
10               x                         0.1x
11               x+300                     0.11(x+300)
12              2900-x-x-300=2600-2x       0.12(2600-2x)
TOTALS          2900                       324
</pre>

Setup and solve the equation  {{{0.1x+0.11(x+300)+0.12(2600-2x)=324}}}.
Then evaluate the other two quantities.