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Simplifying (2x + 54) = 90 Reorder the terms: (54 + 2x) = 90 Remove parenthesis around (54 + 2x) 54 + 2x = 90 Solving 54 + 2x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-54' to each side of the equation. 54 + -54 + 2x = 90 + -54 Combine like terms: 54 + -54 = 0 0 + 2x = 90 + -54 2x = 90 + -54 Combine like terms: 90 + -54 = 36 2x = 36 Divide each side by '2'. x = 18 Simplifying x = 18
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