shapes can't even be made if all the sides are parallel. The angles need to be added up to 360 degrees. There won't even be angles if all the lines are parallel. The opposite sides have to be parallel.
1.)subtract 600 from 750 in order to simplify 2.)divide by 15 on both sides to get y alone. Doing this cancels the 15 on the y and makes the right side equal 10 3.)y=10
