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Simplifying x + (x + 40) + (x + 65) = 180 Reorder the terms: x + (40 + x) + (x + 65) = 180 Remove parenthesis around (40 + x) x + 40 + x + (x + 65) = 180 Reorder the terms: x + 40 + x + (65 + x) = 180 Remove parenthesis around (65 + x) x + 40 + x + 65 + x = 180 Reorder the terms: 40 + 65 + x + x + x = 180 Combine like terms: 40 + 65 = 105 105 + x + x + x = 180 Combine like terms: x + x = 2x 105 + 2x + x = 180 Combine like terms: 2x + x = 3x 105 + 3x = 180 Solving 105 + 3x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-105' to each side of the equation. 105 + -105 + 3x = 180 + -105 Combine like terms: 105 + -105 = 0 0 + 3x = 180 + -105 3x = 180 + -105 Combine like terms: 180 + -105 = 75 3x = 75 Divide each side by '3'. x = 25 Simplifying x = 25
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