SOLUTION: 9=7z-13z-21
Algebra.Com
Question 647589: 9=7z-13z-21
Answer by ReadingBoosters(3246) (Show Source): You can put this solution on YOUR website!
9 = 7z - 13z - 21
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Combine like terms
9 = -5z - 21
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Isolate z on one side
-5z = -21 - 9
-5z = -30
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Divide both sides by -5
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