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Simplifying 20x + 15x + 20(x + -1) + 15 + (x + -1) = 245 Reorder the terms: 20x + 15x + 20(-1 + x) + 15 + (x + -1) = 245 20x + 15x + (-1 * 20 + x * 20) + 15 + (x + -1) = 245 20x + 15x + (-20 + 20x) + 15 + (x + -1) = 245 Reorder the terms: 20x + 15x + -20 + 20x + 15 + (-1 + x) = 245 Remove parenthesis around (-1 + x) 20x + 15x + -20 + 20x + 15 + -1 + x = 245 Reorder the terms: -20 + 15 + -1 + 20x + 15x + 20x + x = 245 Combine like terms: -20 + 15 = -5 -5 + -1 + 20x + 15x + 20x + x = 245 Combine like terms: -5 + -1 = -6 -6 + 20x + 15x + 20x + x = 245 Combine like terms: 20x + 15x = 35x -6 + 35x + 20x + x = 245 Combine like terms: 35x + 20x = 55x -6 + 55x + x = 245 Combine like terms: 55x + x = 56x -6 + 56x = 245 Solving -6 + 56x = 245 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + 56x = 245 + 6 Combine like terms: -6 + 6 = 0 0 + 56x = 245 + 6 56x = 245 + 6 Combine like terms: 245 + 6 = 251 56x = 251 Divide each side by '56'. x = 4.482142857 Simplifying x = 4.482142857
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