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Simplifying 7(x + 30) = 231 Reorder the terms: 7(30 + x) = 231 (30 * 7 + x * 7) = 231 (210 + 7x) = 231 Solving 210 + 7x = 231 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-210' to each side of the equation. 210 + -210 + 7x = 231 + -210 Combine like terms: 210 + -210 = 0 0 + 7x = 231 + -210 7x = 231 + -210 Combine like terms: 231 + -210 = 21 7x = 21 Divide each side by '7'. x = 3 Simplifying x = 3
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