Answer:
Stacey sold 22 children's tickets and 44 adult tickets.
Explanation:
Let a and c represent the numbers of tickets sold.
Then a = 2c (twice as many adult tickets as children's tickets)
Then the equation relating the dollar amounts is
($6/ticket)(2 c) + ($4/ticket)(c) = $352
Then $12c + $4c = $352, so $16c = $352.
Solving this for c, we get 22. Then a = 2c = 2(22) = 44
Stacey sold 22 children's tickets and 44 adult tickets.