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Simplifying 255 + -7x = 28x + 15 Reorder the terms: 255 + -7x = 15 + 28x Solving 255 + -7x = 15 + 28x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-28x' to each side of the equation. 255 + -7x + -28x = 15 + 28x + -28x Combine like terms: -7x + -28x = -35x 255 + -35x = 15 + 28x + -28x Combine like terms: 28x + -28x = 0 255 + -35x = 15 + 0 255 + -35x = 15 Add '-255' to each side of the equation. 255 + -255 + -35x = 15 + -255 Combine like terms: 255 + -255 = 0 0 + -35x = 15 + -255 -35x = 15 + -255 Combine like terms: 15 + -255 = -240 -35x = -240 Divide each side by '-35'. x = 6.857142857 Simplifying x = 6.857142857
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