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Simplifying 2x + (2x + 3.5) = 31 Reorder the terms: 2x + (3.5 + 2x) = 31 Remove parenthesis around (3.5 + 2x) 2x + 3.5 + 2x = 31 Reorder the terms: 3.5 + 2x + 2x = 31 Combine like terms: 2x + 2x = 4x 3.5 + 4x = 31 Solving 3.5 + 4x = 31 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + 4x = 31 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + 4x = 31 + -3.5 4x = 31 + -3.5 Combine like terms: 31 + -3.5 = 27.5 4x = 27.5 Divide each side by '4'. x = 6.875 Simplifying x = 6.875
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