Solve for x: 4x - 9 = 19.
Answer and explanation
Correct answer: C. x = 7
- Step 1: Add 9 to both sides: 4x = 28. Step 2. Divide by 4: x = 7. Answer: x = 7. Why not the others: 28 forgets to divide, and the other values do not satisfy the equation.
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