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Simplifying 15 + -1[2x + -4(3 + -2x)] = -3 15 + -1[2x + (3 * -4 + -2x * -4)] = -3 15 + -1[2x + (-12 + 8x)] = -3 Reorder the terms: 15 + -1[-12 + 2x + 8x] = -3 Combine like terms: 2x + 8x = 10x 15 + -1[-12 + 10x] = -3 15 + [-12 * -1 + 10x * -1] = -3 15 + [12 + -10x] = -3 Combine like terms: 15 + 12 = 27 27 + -10x = -3 Solving 27 + -10x = -3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-27' to each side of the equation. 27 + -27 + -10x = -3 + -27 Combine like terms: 27 + -27 = 0 0 + -10x = -3 + -27 -10x = -3 + -27 Combine like terms: -3 + -27 = -30 -10x = -30 Divide each side by '-10'. x = 3 Simplifying x = 3
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