If 4x − 7 = 21, find the value of x.
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Worked Solution
Step 1: Add 7 to both sides to isolate the term with x: 4x − 7 + 7 = 21 + 7 → 4x = 28
Step 2: Divide both sides by 4: x = 28 ÷ 4
Final answer: x = 7
Answer: 7
Correct answer: 7
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