Which equation has no solution? (A.) a+2 = a+2 (B.) a+2 = a-2 (C.) a = -a+2 (D.) a+a = 2

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1 Answer

(A) has no solution because the terms on either side cancel out leaving 0=0.

[Solutions for the others: (B) falsity, because 2 is not equal to -2; (C) 2a=2 so a=1; (D) a=1]
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