A concert made 131,000 by selling 8,500 tickets. Some sold for $10 and some for $20. How many $10 tickets were sold?

Question

A concert made 131,000 by selling 8,500 tickets. Some sold for $10 and some for $20. How many $10 tickets were sold?

Answer 1

10X + 20Y = 131000

 

X+y = 8500 ---> y = 8500 - x

 

10x + 20( 8500 - x) = 131000

 

10x + 170000 - 20x = 131000

 

170000 - 10x = 131000

 

-10x = 131000 - 170000

 

-10x = -39000

 

x = 3900

 

y = 8500 - 3900 = 4600