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Simplifying 520 = 2x + (x + 1) Reorder the terms: 520 = 2x + (1 + x) Remove parenthesis around (1 + x) 520 = 2x + 1 + x Reorder the terms: 520 = 1 + 2x + x Combine like terms: 2x + x = 3x 520 = 1 + 3x Solving 520 = 1 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 520 + -3x = 1 + 3x + -3x Combine like terms: 3x + -3x = 0 520 + -3x = 1 + 0 520 + -3x = 1 Add '-520' to each side of the equation. 520 + -520 + -3x = 1 + -520 Combine like terms: 520 + -520 = 0 0 + -3x = 1 + -520 -3x = 1 + -520 Combine like terms: 1 + -520 = -519 -3x = -519 Divide each side by '-3'. x = 173 Simplifying x = 173
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