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Simplifying 180 + -1(2x + (x + 20)) = 0 Reorder the terms: 180 + -1(2x + (20 + x)) = 0 Remove parenthesis around (20 + x) 180 + -1(2x + 20 + x) = 0 Reorder the terms: 180 + -1(20 + 2x + x) = 0 Combine like terms: 2x + x = 3x 180 + -1(20 + 3x) = 0 180 + (20 * -1 + 3x * -1) = 0 180 + (-20 + -3x) = 0 Combine like terms: 180 + -20 = 160 160 + -3x = 0 Solving 160 + -3x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-160' to each side of the equation. 160 + -160 + -3x = 0 + -160 Combine like terms: 160 + -160 = 0 0 + -3x = 0 + -160 -3x = 0 + -160 Combine like terms: 0 + -160 = -160 -3x = -160 Divide each side by '-3'. x = 53.33333333 Simplifying x = 53.33333333
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