To the student and the instructor: The Skill Maintenance exercises review skills covered previously in the text. You can expect such exercises in every exercise set. They provide excellent review for a final examination. Answers to all skill maintenance exercises appear in the answer section at the back of the book. If you miss an exercise, restudy the objective shown in red next to the exercise or the instruction line that precedes it. 

Use substitution to determine whether the given ordered pairs are solutions of the given equation.

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(3,-2), (,); 15x - 10y = 32