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Simplifying 7x + -15 + 20x + 45 = 0 Reorder the terms: -15 + 45 + 7x + 20x = 0 Combine like terms: -15 + 45 = 30 30 + 7x + 20x = 0 Combine like terms: 7x + 20x = 27x 30 + 27x = 0 Solving 30 + 27x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + 27x = 0 + -30 Combine like terms: 30 + -30 = 0 0 + 27x = 0 + -30 27x = 0 + -30 Combine like terms: 0 + -30 = -30 27x = -30 Divide each side by '27'. x = -1.111111111 Simplifying x = -1.111111111
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