HESI A2 Flashcards
Solve for x: 4x - 7 = 29.
A. 5.5
B. 7
C. 9
D. 11
Rationale
Correct. Add 7 to both sides to obtain 4x = 36. Divide both sides by 4, so x = 9. Check by substitution: 4(9) - 7 = 36 - 7 = 29. Choices (A) and (B) come from incomplete inverse operations. Using the same inverse operation on both sides preserves equality.
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