I need this answer now! Please help me!

X - number of children passes sold

1820 - X --- Number of adults passes sold

X ( $2) + ( 1820 - X ) $5 = $6100 ( 1)

Solve for X , in equation ( 1)

2X + 9100 - 5X = 6100

-2X = -9100 + 6100 = -3000

X = 1500 / # of children passes sold

1820 - 1500 = 320 / # of adult passes sold.

Remember always choose a variable for unknown , what problem is asking to find.