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Simplifying 80 = 2 + -1x + 2(2 + -1x) + 2 + -1(2 + -1x) 80 = 2 + -1x + (2 * 2 + -1x * 2) + 2 + -1(2 + -1x) 80 = 2 + -1x + (4 + -2x) + 2 + -1(2 + -1x) 80 = 2 + -1x + 4 + -2x + 2 + (2 * -1 + -1x * -1) 80 = 2 + -1x + 4 + -2x + 2 + (-2 + 1x) Reorder the terms: 80 = 2 + 4 + 2 + -2 + -1x + -2x + 1x Combine like terms: 2 + 4 = 6 80 = 6 + 2 + -2 + -1x + -2x + 1x Combine like terms: 6 + 2 = 8 80 = 8 + -2 + -1x + -2x + 1x Combine like terms: 8 + -2 = 6 80 = 6 + -1x + -2x + 1x Combine like terms: -1x + -2x = -3x 80 = 6 + -3x + 1x Combine like terms: -3x + 1x = -2x 80 = 6 + -2x Solving 80 = 6 + -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. 80 + 2x = 6 + -2x + 2x Combine like terms: -2x + 2x = 0 80 + 2x = 6 + 0 80 + 2x = 6 Add '-80' to each side of the equation. 80 + -80 + 2x = 6 + -80 Combine like terms: 80 + -80 = 0 0 + 2x = 6 + -80 2x = 6 + -80 Combine like terms: 6 + -80 = -74 2x = -74 Divide each side by '2'. x = -37 Simplifying x = -37
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