Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. 
- 
A. -5
B. -5x
C. -5x
D. 7x
Answer: B
Mathematics
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Fill in the blank(s) with the appropriate word(s).
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,
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A. {5, -2} B. {5, 2} C. {-5, -2} D. {-5, 2}
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