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Simplifying 7x + 20x + 40 = 13 Reorder the terms: 40 + 7x + 20x = 13 Combine like terms: 7x + 20x = 27x 40 + 27x = 13 Solving 40 + 27x = 13 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-40' to each side of the equation. 40 + -40 + 27x = 13 + -40 Combine like terms: 40 + -40 = 0 0 + 27x = 13 + -40 27x = 13 + -40 Combine like terms: 13 + -40 = -27 27x = -27 Divide each side by '27'. x = -1 Simplifying x = -1
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