Free points! Have a good rest of your day

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

Gail is making costumes for a school play. each rabbit costume needs one and one half yards of white fur fabric, a yard of blue striped fabric, and a quarter of a yard of pink felt for the ears. g? ail needs to make eight rabbit man yards will she need, for the white fur fabric, blue striped fabric, and pink felt?

How do you use the elimination method for this question? explain, because i really want to understand!