$8,000 is invested in two different accounts earning 3% and 4% interest. If the two accounts earn a total of $295 in interest, how much money was invested at 3%?
The money invested at
We call the quantity invested at
Than we have that $$X+Y=8000$$ and also $$X\times 3/100+Y\times4/100=295.$$
We are interested in
and we solve for