To solve the inequality \( 5 < 12y - 7 \), Kirk would go through the following steps:
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Add 7 to both sides of the inequality: \[ 5 + 7 < 12y \implies 12 < 12y \]
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Divide both sides of the equivalent inequality by 12: \[ \frac{12}{12} < y \implies 1 < y \]
This means that the correct explanation among the provided options is:
Kirk adds 7 to both sides of the inequality and then divides both sides of the equivalent inequality by 12 to get \( 1 < y \).