Solve for x: 3x + 7 = 22.
Answer and explanation
Correct answer: A. x = 5
- Step 1: Subtract 7 from both sides: 3x = 15. Step 2. Divide both sides by 3: x = 5. Answer: x = 5. Why not the others: x = 3 comes from 22 - 7 divided by 5, x = 7 repeats the constant, and x = 9 comes from adding 7 instead of subtracting.
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