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Simplifying 7x + 2x + 27 = 90 Reorder the terms: 27 + 7x + 2x = 90 Combine like terms: 7x + 2x = 9x 27 + 9x = 90 Solving 27 + 9x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-27' to each side of the equation. 27 + -27 + 9x = 90 + -27 Combine like terms: 27 + -27 = 0 0 + 9x = 90 + -27 9x = 90 + -27 Combine like terms: 90 + -27 = 63 9x = 63 Divide each side by '9'. x = 7 Simplifying x = 7
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