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Simplifying 20x + 15x + (x + -1) + 15(x + -1) = 245 Reorder the terms: 20x + 15x + (-1 + x) + 15(x + -1) = 245 Remove parenthesis around (-1 + x) 20x + 15x + -1 + x + 15(x + -1) = 245 Reorder the terms: 20x + 15x + -1 + x + 15(-1 + x) = 245 20x + 15x + -1 + x + (-1 * 15 + x * 15) = 245 20x + 15x + -1 + x + (-15 + 15x) = 245 Reorder the terms: -1 + -15 + 20x + 15x + x + 15x = 245 Combine like terms: -1 + -15 = -16 -16 + 20x + 15x + x + 15x = 245 Combine like terms: 20x + 15x = 35x -16 + 35x + x + 15x = 245 Combine like terms: 35x + x = 36x -16 + 36x + 15x = 245 Combine like terms: 36x + 15x = 51x -16 + 51x = 245 Solving -16 + 51x = 245 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + 51x = 245 + 16 Combine like terms: -16 + 16 = 0 0 + 51x = 245 + 16 51x = 245 + 16 Combine like terms: 245 + 16 = 261 51x = 261 Divide each side by '51'. x = 5.117647059 Simplifying x = 5.117647059
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