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Simplifying 15 = w + 7 Reorder the terms: 15 = 7 + w Solving 15 = 7 + w Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1w' to each side of the equation. 15 + -1w = 7 + w + -1w Combine like terms: w + -1w = 0 15 + -1w = 7 + 0 15 + -1w = 7 Add '-15' to each side of the equation. 15 + -15 + -1w = 7 + -15 Combine like terms: 15 + -15 = 0 0 + -1w = 7 + -15 -1w = 7 + -15 Combine like terms: 7 + -15 = -8 -1w = -8 Divide each side by '-1'. w = 8 Simplifying w = 8
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