Question 346112
Let {{{A}}} be the amount at 6%, {{{B}}} the amount at 11%.
.
.
.
1.{{{A+B=10000}}}
2.{{{6A+11B=80000}}}
Multiply eq. 1 by (-6) and add to eq. 2,
{{{-6A-6B+6A+11B=-60000+80000}}}
{{{5B=20000}}}
{{{highlight( B=4000)}}}
Then from eq. 1,
{{{A+4000=10000}}}
{{{highlight(A=6000)}}}
.
.
.
$6000 at 6% and $4000 at 11%.