SOLUTION: Please help me with this: 3-[7x+2y-{5x-9y}+2x+4y]

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Question 55194: Please help me with this:
3-[7x+2y-{5x-9y}+2x+4y]
Answer by Cintchr(481) About Me  (Show Source):
You can put this solution on YOUR website!
+3-%287x%2B2y-%285x-9y%29%2B2x%2B4y%29+
Start by distributing the undertood value of -1 across the (5x-9y) thereby changing their signs
+3-%287x%2B2y-5x%2B9y%2B2x%2B4y%29+
Combine like terms within the ( )
+3-+%284x%2B+15y%29+
Distribute the undertood value of -1 across the (4x+15y) thereby changing their signs
+3-4x-15y%29+
While this is technically correct, your teacher may wish you to put it in "proper order"
+-4x-15y%2B3+