Question

$5,000 is invested in two different accounts yielding 3% and 3.5% interest. The interest earned on the two accounts is $155.

How much money was invested at 3% interest?

answer list
$1,000
$3,000
$4,000

Answer 1

$4000

Answer 2

you can put \(x\) = amount of money invested at 3% then since the total was 5,000 the amount invested at 3.5% is \(5000-x\) and solve
\[.03x+.035(5000-x)=155\] for \(x\)

Answer 3

may be easier to remove decimals by multiplying by 1000 and solve
\[30x+35(5000-x)=150000\]