Answers

2016-02-23T00:09:28+08:00
For Example:  
     3    2                        2     1
(1y + 2y  -3x + 4) + (3y  + 3y  + 5x + 3)

And the Arrange it by Column after that add all to get the ans is
=   5      3
  4y + 5y  + 8x + 7




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