Which is the contrapositive of p → q?

The contrapositive of “if p, then q” is “if not q, then not p.” Here, p is “3x + 7 = −5” and q is “4x + 12 = −4,” so the contrapositive is “If 4x + 12 ≠ −4, then 3x + 7 ≠ −5.”

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