you have $7200 in principal and invest different sums @ 10% and 14%. You receive 920 at end of term. (one year)What amounts are invested at what rate? How do I solve this? 

Hi, Suppose that $x is the amount that is invested at 10%, then $(7200x) is invested at 14%. At the end of the year you receive
and
The total of these two amounts is $920. Can you now find x? Penny 

