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This is what every question looks like after you complete your test. Every answer explained like a private tutor.
If 3x + 7 = 22, what is the value of x?
Teaching Explanation
To solve 3x + 7 = 22, start by isolating the variable. Subtract 7 from both sides: 3x = 15. Then divide both sides by 3: x = 5. You can verify by plugging back in: 3(5) + 7 = 15 + 7 = 22. When solving linear equations, always perform the same operation on both sides to maintain equality. Work from the outside in — handle addition/subtraction first, then multiplication/division.
This is one of 5,200+ questions across 80+ mirrored preparation tests. Every single answer includes a detailed teaching explanation.
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Every test mirrors the real exam. Every answer explained.
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All assessments on US Testing Center are independent mirrored preparation tests created using the ALA Mirror Method by Guinness World Records Puzzle Master Timothy E. Parker. They are professionally developed mirrored preparation assessments designed to mirror the structure, format, question count, and difficulty of real exams. They are not actual certification, licensure, or admissions examinations. Exam names are trademarks of their respective organizations.