PLEASE HELP ME show your work on how you did it! For BRAINLIEST

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer

Examine this system of equations. what integer should the second equation be multiplied by so that when the two equations are added together, the x term is eliminated? 3/4x+1/7y=6 1/8x-3/5y=16