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Decide Whether the Equation Is "Conditional," an "Identity," or a "Contradiction

Question 246

Multiple Choice

Decide whether the equation is "conditional," an "identity," or a "contradiction." Give its solution set.
- 2[3−(9−5r) ]−r=−18+3(2+3r) 2 [ 3 - ( 9 - 5 r ) ] - r = - 18 + 3 ( 2 + 3 r )


A) Conditional; {18}\{ 18 \}
B) Conditional; {−9}\{ - 9 \}
C) Contradiction; ∅\varnothing
D) Identity; {all real numbers }\}

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