SOLUTION: – 3[–(x + 2y) – 3(y – x)]

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Question 62319: – 3[–(x + 2y) – 3(y – x)]
Answer by uma(370) About Me  (Show Source):
You can put this solution on YOUR website!
-3[-(x+2y)-3(y-x)]
==> -3[-x - 2y - 3y + 3x]
==> 3x + 6y + 9y - 9x
==> - 6x + 15y

Good Luck!!!