Please read the directions below and answer the problems!! Worth a lot of points and I will give brainliest:

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian 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? i need this done

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers