Can you help me?

What is:

-3x=15

M-8= -5

Diana is painting statues she has 7/8 of a liter of paint each statue requires 1/20 of a liter of paint how many statues can she paint?

For each proportion find the unknown number x 1/5/8=×/15

Adriver from the university of florida women’s swimming and diving team is competing in the in ncaa zone b championships