At the movies, adults tickets cost 12.00 and kids tickets cost 9.00 a group of students and adults chaperone came and spent a total of 318.00although they brought 34. tickets how many kids tickets were sold

There would be 30 kid tickets and 4 adult tickets .. if you take 12 times that by 4 you get 48 .. then take 48 from 318 and you get 270 then divide that by 9 and get 30 .. 30 plus 4 is 34 tickets

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)