Which is the contrapositive of p → q?

The contrapositive of p → q is ¬q → ¬p: reverse the statements and negate both. Here, p is “3x + 7 = −5” and q is “4x + 12 = −4.” So the contrapositive is “If 4x + 12 ≠ −4, then 3x + 7 ≠ −5,” which is choice D.

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