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Simplifying 90 + 7x + 45 = 115 Reorder the terms: 90 + 45 + 7x = 115 Combine like terms: 90 + 45 = 135 135 + 7x = 115 Solving 135 + 7x = 115 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-135' to each side of the equation. 135 + -135 + 7x = 115 + -135 Combine like terms: 135 + -135 = 0 0 + 7x = 115 + -135 7x = 115 + -135 Combine like terms: 115 + -135 = -20 7x = -20 Divide each side by '7'. x = -2.857142857 Simplifying x = -2.857142857
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