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Simplifying 2x + -1(-1x) + 15 = (-1x) + -1x Remove parenthesis around (-1x) 2x + -1 * -1x + 15 = (-1x) + -1x Multiply -1 * -1 2x + 1x + 15 = (-1x) + -1x Reorder the terms: 15 + 2x + 1x = (-1x) + -1x Combine like terms: 2x + 1x = 3x 15 + 3x = (-1x) + -1x Combine like terms: (-1x) + -1x = -2x 15 + 3x = -2x Solving 15 + 3x = -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. 15 + 3x + 2x = -2x + 2x Combine like terms: 3x + 2x = 5x 15 + 5x = -2x + 2x Combine like terms: -2x + 2x = 0 15 + 5x = 0 Add '-15' to each side of the equation. 15 + -15 + 5x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + 5x = 0 + -15 5x = 0 + -15 Combine like terms: 0 + -15 = -15 5x = -15 Divide each side by '5'. x = -3 Simplifying x = -3
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