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Simplifying -1[3x + -1(2x + 1)] = -4 + -1[3(2x + -4) + -3x] Reorder the terms: -1[3x + -1(1 + 2x)] = -4 + -1[3(2x + -4) + -3x] -1[3x + (1 * -1 + 2x * -1)] = -4 + -1[3(2x + -4) + -3x] -1[3x + (-1 + -2x)] = -4 + -1[3(2x + -4) + -3x] Reorder the terms: -1[-1 + 3x + -2x] = -4 + -1[3(2x + -4) + -3x] Combine like terms: 3x + -2x = 1x -1[-1 + 1x] = -4 + -1[3(2x + -4) + -3x] [-1 * -1 + 1x * -1] = -4 + -1[3(2x + -4) + -3x] [1 + -1x] = -4 + -1[3(2x + -4) + -3x] Reorder the terms: 1 + -1x = -4 + -1[3(-4 + 2x) + -3x] 1 + -1x = -4 + -1[(-4 * 3 + 2x * 3) + -3x] 1 + -1x = -4 + -1[(-12 + 6x) + -3x] Combine like terms: 6x + -3x = 3x 1 + -1x = -4 + -1[-12 + 3x] 1 + -1x = -4 + [-12 * -1 + 3x * -1] 1 + -1x = -4 + [12 + -3x] Combine like terms: -4 + 12 = 8 1 + -1x = 8 + -3x Solving 1 + -1x = 8 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. 1 + -1x + 3x = 8 + -3x + 3x Combine like terms: -1x + 3x = 2x 1 + 2x = 8 + -3x + 3x Combine like terms: -3x + 3x = 0 1 + 2x = 8 + 0 1 + 2x = 8 Add '-1' to each side of the equation. 1 + -1 + 2x = 8 + -1 Combine like terms: 1 + -1 = 0 0 + 2x = 8 + -1 2x = 8 + -1 Combine like terms: 8 + -1 = 7 2x = 7 Divide each side by '2'. x = 3.5 Simplifying x = 3.5
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