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Simplifying 3(7x + 6) = -213 Reorder the terms: 3(6 + 7x) = -213 (6 * 3 + 7x * 3) = -213 (18 + 21x) = -213 Solving 18 + 21x = -213 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + 21x = -213 + -18 Combine like terms: 18 + -18 = 0 0 + 21x = -213 + -18 21x = -213 + -18 Combine like terms: -213 + -18 = -231 21x = -231 Divide each side by '21'. x = -11 Simplifying x = -11
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