What happens to the value of an integer on the positive side of the number line and how is that different from what happens to the value of an integer on the negative side of the number line?

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?