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Simplifying 0.5(13 + x) * 14 = 231 Reorder the terms for easier multiplication: 0.5 * 14(13 + x) = 231 Multiply 0.5 * 14 7(13 + x) = 231 (13 * 7 + x * 7) = 231 (91 + 7x) = 231 Solving 91 + 7x = 231 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-91' to each side of the equation. 91 + -91 + 7x = 231 + -91 Combine like terms: 91 + -91 = 0 0 + 7x = 231 + -91 7x = 231 + -91 Combine like terms: 231 + -91 = 140 7x = 140 Divide each side by '7'. x = 20 Simplifying x = 20
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