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Simplifying 21x + 18x = 445 Combine like terms: 21x + 18x = 39x 39x = 445 Solving 39x = 445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '39'. x = 11.41025641 Simplifying x = 11.41025641
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