P6 - Algebra

1. Simplify each of the following.
(a) 5a+3a-6a
(b) 3a-(5a-4a)
(c) 3a+4b-a-b
(d) 12a+5b-7a-14b-9a
(e) 5x+7y+3z-2x-4y+z
(f) 2p-5q+7r-4p+2q-3r
(g) 12xy-13xz+5yz-4xz
(h) 7abc-4bca+6cba-cba
(i) 3a-4a+5a-7a+4
(j) 5ab-1.5ab+0.75bc+0.25cb

2. Evaluate each of the following.
(a)3a-5a+4a
(b)12a+5b-7a-14b-9a
(c)12p-25q+7r-4p+12q-3r
(d)7abc-41bca+16cba-3cba
(e)a+b+c+2b-c+3c+a
(f) 2ab+3bc+5ac-5ba+2cb+5ab