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This word problem set involves solving systems of equations equations working with supplementary and complementary angles. Creating two equations with two unknowns is needed to solve the problems. There are 10 problems of increasing difficulty with full written out solution keys. Substitution is demonstrated in the answer keys to solve these problems. One method for use could be to demonstrate 5 problems in class and have the students solve the remaining 5 for homework. In a 45 minute block, I typically introduce two problem sets of two different "types". If your students are just beginning to solve word problems, I have a free graphic organizer that might help.