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Simplifying -3(7x + 3) = -261 Reorder the terms: -3(3 + 7x) = -261 (3 * -3 + 7x * -3) = -261 (-9 + -21x) = -261 Solving -9 + -21x = -261 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -21x = -261 + 9 Combine like terms: -9 + 9 = 0 0 + -21x = -261 + 9 -21x = -261 + 9 Combine like terms: -261 + 9 = -252 -21x = -252 Divide each side by '-21'. x = 12 Simplifying x = 12
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