if you want to make a specific term the subject, you need to isolate it on one side of the equation. You do this by 'getting rid' of anything on the term's side of the equation, starting with whatever's furthest from the term. (think BEMDAS but backwards)
p = 6q + 7
(take 7 from both sides to get rid of +7 on q's side)
p - 7 = 6q + 7 - 7
p - 7 = 6q(divide both sides by 6 to get rid of 6 on q's side)
8 1/2 or 8.5 x11 = 93.5 square inches thus, 1000 square inches divided by 93.5 square inches 1000/93.5 ~10.695 that mean that Jodi can cut out about 10 pieces of paper measuring 8 1/2 x 11 inches.