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Simplifying 7 + -1[2(1 + -1x) + -3(x + 2) + -3] = 0 7 + -1[(1 * 2 + -1x * 2) + -3(x + 2) + -3] = 0 7 + -1[(2 + -2x) + -3(x + 2) + -3] = 0 Reorder the terms: 7 + -1[2 + -2x + -3(2 + x) + -3] = 0 7 + -1[2 + -2x + (2 * -3 + x * -3) + -3] = 0 7 + -1[2 + -2x + (-6 + -3x) + -3] = 0 Reorder the terms: 7 + -1[2 + -6 + -3 + -2x + -3x] = 0 Combine like terms: 2 + -6 = -4 7 + -1[-4 + -3 + -2x + -3x] = 0 Combine like terms: -4 + -3 = -7 7 + -1[-7 + -2x + -3x] = 0 Combine like terms: -2x + -3x = -5x 7 + -1[-7 + -5x] = 0 7 + [-7 * -1 + -5x * -1] = 0 7 + [7 + 5x] = 0 Combine like terms: 7 + 7 = 14 14 + 5x = 0 Solving 14 + 5x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + 5x = 0 + -14 Combine like terms: 14 + -14 = 0 0 + 5x = 0 + -14 5x = 0 + -14 Combine like terms: 0 + -14 = -14 5x = -14 Divide each side by '5'. x = -2.8 Simplifying x = -2.8
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