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Simplifying 3(7x + 5) = 31 Reorder the terms: 3(5 + 7x) = 31 (5 * 3 + 7x * 3) = 31 (15 + 21x) = 31 Solving 15 + 21x = 31 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 21x = 31 + -15 Combine like terms: 15 + -15 = 0 0 + 21x = 31 + -15 21x = 31 + -15 Combine like terms: 31 + -15 = 16 21x = 16 Divide each side by '21'. x = 0.7619047619 Simplifying x = 0.7619047619
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