Solve by the substitution method. 2x 6y = -12 -x + 3y = 6 Step 1 (1) 2x – 6y = -12 (2) -x + 3y = 6 Solve equation (2) for x. -x + 3y = 6 Subtract 3y from each side of the equation. Fill in the blank to make a true statement Two people completed a job. If one person completed of the job and the other person completed of the job, then 50 Simplify. a2 3a + 4 10a + 21 3 a – 3 Step 1 Write each denominator in factored form. 3a + 4 3a + 4 3 az – 10a + 21 a – 3 3 a – 3 Factor. (If the expression is nonfactorable over the integers, enter NONFACTORABLE.) 16×4 81
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