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Simplifying x + 2(2 + x) = 4 + -1x x + (2 * 2 + x * 2) = 4 + -1x x + (4 + 2x) = 4 + -1x Reorder the terms: 4 + x + 2x = 4 + -1x Combine like terms: x + 2x = 3x 4 + 3x = 4 + -1x Add '-4' to each side of the equation. 4 + -4 + 3x = 4 + -4 + -1x Combine like terms: 4 + -4 = 0 0 + 3x = 4 + -4 + -1x 3x = 4 + -4 + -1x Combine like terms: 4 + -4 = 0 3x = 0 + -1x 3x = -1x Solving 3x = -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. 3x + x = -1x + x Combine like terms: 3x + x = 4x 4x = -1x + x Combine like terms: -1x + x = 0 4x = 0 Divide each side by '4'. x = 0 Simplifying x = 0
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