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Simplifying 255 = 2x + 7(-4x + 3) Reorder the terms: 255 = 2x + 7(3 + -4x) 255 = 2x + (3 * 7 + -4x * 7) 255 = 2x + (21 + -28x) Reorder the terms: 255 = 21 + 2x + -28x Combine like terms: 2x + -28x = -26x 255 = 21 + -26x Solving 255 = 21 + -26x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '26x' to each side of the equation. 255 + 26x = 21 + -26x + 26x Combine like terms: -26x + 26x = 0 255 + 26x = 21 + 0 255 + 26x = 21 Add '-255' to each side of the equation. 255 + -255 + 26x = 21 + -255 Combine like terms: 255 + -255 = 0 0 + 26x = 21 + -255 26x = 21 + -255 Combine like terms: 21 + -255 = -234 26x = -234 Divide each side by '26'. x = -9 Simplifying x = -9
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