8. A sightseeing boat charges $4 for children and $7 for adults. On its first trip of the day it collected $535 for 91 paying passengers. How many children and adults were there?
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This does not make sense

Ithink it is b and d

The great thing about this problem is they give you everything you need to solve it easily. so the expression is: 12h+30w12h+30wand so everywhere you have an “h” you place 66. and everywhere you have a “w” you place 33. then the expression will look like this: 12(66)+30(33)12(66)+30(33)from here you multiply and then add. getting the following of: $785,862hope this