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Simplifying 21x + 5 = 257 Reorder the terms: 5 + 21x = 257 Solving 5 + 21x = 257 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 21x = 257 + -5 Combine like terms: 5 + -5 = 0 0 + 21x = 257 + -5 21x = 257 + -5 Combine like terms: 257 + -5 = 252 21x = 252 Divide each side by '21'. x = 12 Simplifying x = 12
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