Solve for x: 9x + 20 = 92.
Answer and explanation
Correct answer: D. 8
- Step 1: Subtract 20 from both sides: 9x = 72. Step 2. Divide both sides by 9: x = 8. Answer: 8. Why not the others: 72: Subtracting 20 gives 72, but that still has to be divided by 9. 112: The 20 must be subtracted from both sides, not added. 9: That is one more than the value that satisfies the equation.
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