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Simplifying 7(x + 1) = 5(x + 5) Reorder the terms: 7(1 + x) = 5(x + 5) (1 * 7 + x * 7) = 5(x + 5) (7 + 7x) = 5(x + 5) Reorder the terms: 7 + 7x = 5(5 + x) 7 + 7x = (5 * 5 + x * 5) 7 + 7x = (25 + 5x) Solving 7 + 7x = 25 + 5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5x' to each side of the equation. 7 + 7x + -5x = 25 + 5x + -5x Combine like terms: 7x + -5x = 2x 7 + 2x = 25 + 5x + -5x Combine like terms: 5x + -5x = 0 7 + 2x = 25 + 0 7 + 2x = 25 Add '-7' to each side of the equation. 7 + -7 + 2x = 25 + -7 Combine like terms: 7 + -7 = 0 0 + 2x = 25 + -7 2x = 25 + -7 Combine like terms: 25 + -7 = 18 2x = 18 Divide each side by '2'. x = 9 Simplifying x = 9
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