Question 50889
Correct, except you are missing a variable: x = child  y = adult
2.00x + 3.00y = 1050.00
2x + 3(400 - x) = 1050
2x + 1200 - 3x = 1050
-x = -150
x = 150
plug:
400 - x = y
400 - 150 = y = 250
250 adult's tickets and 150 children's tickets