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Simplifying 5x + 2x + -9 = 90 Reorder the terms: -9 + 5x + 2x = 90 Combine like terms: 5x + 2x = 7x -9 + 7x = 90 Solving -9 + 7x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 7x = 90 + 9 Combine like terms: -9 + 9 = 0 0 + 7x = 90 + 9 7x = 90 + 9 Combine like terms: 90 + 9 = 99 7x = 99 Divide each side by '7'. x = 14.14285714 Simplifying x = 14.14285714
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