add the following 3x+2y-zand 2x-y+3z
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answer is 5x+y+2z
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(3x + 2y - z) + (2x - y + 3z)
3x + 2y - z + 2x - y + 3z
(3x +2x) + (2y - y) + (-z + 3z)
5x + y + 2z
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