Ryan made 65 ounces of apple jelly. he put the same amout of jelly into 6 jars. about how much jelly is in each jar

Can someone explain the elimination method to me for this problem?

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.