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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.
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