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Simplifying 2x + 7x + -45 + 2x = 100 Reorder the terms: -45 + 2x + 7x + 2x = 100 Combine like terms: 2x + 7x = 9x -45 + 9x + 2x = 100 Combine like terms: 9x + 2x = 11x -45 + 11x = 100 Solving -45 + 11x = 100 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '45' to each side of the equation. -45 + 45 + 11x = 100 + 45 Combine like terms: -45 + 45 = 0 0 + 11x = 100 + 45 11x = 100 + 45 Combine like terms: 100 + 45 = 145 11x = 145 Divide each side by '11'. x = 13.18181818 Simplifying x = 13.18181818
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