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  • 09-12-2015
  • Mathematics
contestada

Simplify (x - y + 1) - (x + y - 1).
2x - 2y + 2
-2y + 2
2y - 2
-2x + 2y

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  • 03-01-2016
[tex](x - y + 1) - (x + y - 1) \\ \\ x - y + 1 - x - y + 1 \\ \\ (x - x) + (-y -y) + (1 + 1) \\ \\ -2y + 2 \\ \\ Answer: \fbox {-2y + 2} [/tex]
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