Question 948037
Total number of bills
{{{F+H=15}}}
Total value of bills
{{{50F+100H=1000}}}
{{{F+2H=20}}}
Subtracting,
{{{F+2H-F-H=20-15}}}
{{{H=5}}}
Then,
{{{F+5=15}}}
{{{F=10}}}
Ten $50 and five $100 bills.