Solve the equation 3x − 7 = 11.

Answer and explanation

Correct answer: C. x = 6

  1. Step 1: Add 7 to both sides to get 3x = 18. Step 2. Divide both sides by 3. Answer: x = 6. Why not the others: 4 divides before adding, 18 skips the division, and 3 uses an invalid halving.

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