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Simplifying 21x + 5 = 23 + -5 Reorder the terms: 5 + 21x = 23 + -5 Combine like terms: 23 + -5 = 18 5 + 21x = 18 Solving 5 + 21x = 18 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 = 18 + -5 Combine like terms: 5 + -5 = 0 0 + 21x = 18 + -5 21x = 18 + -5 Combine like terms: 18 + -5 = 13 21x = 13 Divide each side by '21'. x = 0.619047619 Simplifying x = 0.619047619
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