(5x+3)(7x-7) how do find x

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?