Algebra questions need help

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Simplify 23 + 5x + 7y – x – y – 27.   Justify your steps.

Jul 22nd, 2015

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23 + 5x + 7y – x – y – 27

23 + 5x  – x + 7y– y – 27

23 + 4x + 6y -27           .................(because 5x- 1x = 4x and 7y -y = 6y)

4x + 6y + 23 -27............................(  23 -27 = -4)

4x + 6y - 4  ...................................................................ANSWER



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Jul 22nd, 2015

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