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Simplifying 7(x + 4) = 81 Reorder the terms: 7(4 + x) = 81 (4 * 7 + x * 7) = 81 (28 + 7x) = 81 Solving 28 + 7x = 81 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + 7x = 81 + -28 Combine like terms: 28 + -28 = 0 0 + 7x = 81 + -28 7x = 81 + -28 Combine like terms: 81 + -28 = 53 7x = 53 Divide each side by '7'. x = 7.571428571 Simplifying x = 7.571428571
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