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Simplifying (x + 12) + (7x + -31) + (7x + -31) = 180 Reorder the terms: (12 + x) + (7x + -31) + (7x + -31) = 180 Remove parenthesis around (12 + x) 12 + x + (7x + -31) + (7x + -31) = 180 Reorder the terms: 12 + x + (-31 + 7x) + (7x + -31) = 180 Remove parenthesis around (-31 + 7x) 12 + x + -31 + 7x + (7x + -31) = 180 Reorder the terms: 12 + x + -31 + 7x + (-31 + 7x) = 180 Remove parenthesis around (-31 + 7x) 12 + x + -31 + 7x + -31 + 7x = 180 Reorder the terms: 12 + -31 + -31 + x + 7x + 7x = 180 Combine like terms: 12 + -31 = -19 -19 + -31 + x + 7x + 7x = 180 Combine like terms: -19 + -31 = -50 -50 + x + 7x + 7x = 180 Combine like terms: x + 7x = 8x -50 + 8x + 7x = 180 Combine like terms: 8x + 7x = 15x -50 + 15x = 180 Solving -50 + 15x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '50' to each side of the equation. -50 + 50 + 15x = 180 + 50 Combine like terms: -50 + 50 = 0 0 + 15x = 180 + 50 15x = 180 + 50 Combine like terms: 180 + 50 = 230 15x = 230 Divide each side by '15'. x = 15.33333333 Simplifying x = 15.33333333
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