Question 315583
OK, first name your variables.
Let {{{A}}} be the amount at 8%,{{{ B}}} the amount at 9%. 
You know the relationship between A and B. 
1.{{{B=3000+2A}}}
Also you know the total interest from both of the investments.
{{{0.08A+0.09B=3130}}}
Multiply both side by 100 to get rid of decimals.
{{{8A+9B=313000}}}
Substitute eq. 1 into eq. 2 and solve for A.
{{{8A+9(3000+2A)=313000}}}
{{{8A+27000+18A=313000}}}
{{{26A=286000}}}
{{{highlight( A=11000)}}}
Then from eq. 1,
{{{B=3000+2(11000)}}}
{{{B=3000+22000}}}
{{{highlight( B=25000)}}}