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Simplifying x + (x + -2) + (3 + x) = 20 Reorder the terms: x + (-2 + x) + (3 + x) = 20 Remove parenthesis around (-2 + x) x + -2 + x + (3 + x) = 20 Remove parenthesis around (3 + x) x + -2 + x + 3 + x = 20 Reorder the terms: -2 + 3 + x + x + x = 20 Combine like terms: -2 + 3 = 1 1 + x + x + x = 20 Combine like terms: x + x = 2x 1 + 2x + x = 20 Combine like terms: 2x + x = 3x 1 + 3x = 20 Solving 1 + 3x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 3x = 20 + -1 Combine like terms: 1 + -1 = 0 0 + 3x = 20 + -1 3x = 20 + -1 Combine like terms: 20 + -1 = 19 3x = 19 Divide each side by '3'. x = 6.333333333 Simplifying x = 6.333333333
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