To be handed in on 11 nov 2008
Simplify the following:
1. (a) 5a+3a-6a
(b)3a+4b-a-b
(c)5x+7y+3z-2x-4y+z
(d)12xy-13xz+5yz-4xz
(e)3a-4a+5a-7a+4
(f)5ab-1.5ab+0.75bc+0.25cb
2. (a)3a-5a+4a
(b)12a+5b-7a-14b-9a
(c)2p-5q+7r-4p+2q-3r
(d)7abc-4bca+6cba-cba
(e)a+b+c+2b-c+3c+a
(f) 2ab+3bc+5ac-5ba+2cb+5ab
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