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Simplifying 2x + 5x + 15 = 43 Reorder the terms: 15 + 2x + 5x = 43 Combine like terms: 2x + 5x = 7x 15 + 7x = 43 Solving 15 + 7x = 43 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 7x = 43 + -15 Combine like terms: 15 + -15 = 0 0 + 7x = 43 + -15 7x = 43 + -15 Combine like terms: 43 + -15 = 28 7x = 28 Divide each side by '7'. x = 4 Simplifying x = 4
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