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Simplifying (4x + 9) + (7x + -13) + (2x + 12) = 180 Reorder the terms: (9 + 4x) + (7x + -13) + (2x + 12) = 180 Remove parenthesis around (9 + 4x) 9 + 4x + (7x + -13) + (2x + 12) = 180 Reorder the terms: 9 + 4x + (-13 + 7x) + (2x + 12) = 180 Remove parenthesis around (-13 + 7x) 9 + 4x + -13 + 7x + (2x + 12) = 180 Reorder the terms: 9 + 4x + -13 + 7x + (12 + 2x) = 180 Remove parenthesis around (12 + 2x) 9 + 4x + -13 + 7x + 12 + 2x = 180 Reorder the terms: 9 + -13 + 12 + 4x + 7x + 2x = 180 Combine like terms: 9 + -13 = -4 -4 + 12 + 4x + 7x + 2x = 180 Combine like terms: -4 + 12 = 8 8 + 4x + 7x + 2x = 180 Combine like terms: 4x + 7x = 11x 8 + 11x + 2x = 180 Combine like terms: 11x + 2x = 13x 8 + 13x = 180 Solving 8 + 13x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + 13x = 180 + -8 Combine like terms: 8 + -8 = 0 0 + 13x = 180 + -8 13x = 180 + -8 Combine like terms: 180 + -8 = 172 13x = 172 Divide each side by '13'. x = 13.23076923 Simplifying x = 13.23076923
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