Solve for x: 8x + 13 = 77.
Answer and explanation
Correct answer: D. 8
- Step 1: Subtract 13 from both sides: 8x = 64. Step 2. Divide both sides by 8: x = 8. Answer: 8. Why not the others: 11.25: this adds 13 instead of subtracting it. 9.62: this ignores the 13. 56: this subtracts the coefficient instead of dividing by it.
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