SOLUTION: 4a - 2[2b -(b - 2a)] + 3b

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Question 17837: 4a - 2[2b -(b - 2a)] + 3b
Answer by venugopalramana(3286) About Me  (Show Source):
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4a - 2[2b -(b - 2a)] + 3b
=4a-2*2b+2(b-2a)+3b
=4a-4b+2b-4a+3b
=a(4-4)+b(-4+2+3)
=b