Naomi, Macy, and Sebastián have 234 stamps in all. Naomi gives 16 stamps to Macy and 24 stamps to Sebastián. Naomi then has 3 times as many stamps as Macy, and Macy has twice as many stamps as Sebastián. How many stamps does Naomi have at first?

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

Im not that good with division but i think 5 is -6but dont quote me on thatim not the best in division but thats my answer

What am i doing here. add?