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Simplifying -7(3x + 9) = -252 Reorder the terms: -7(9 + 3x) = -252 (9 * -7 + 3x * -7) = -252 (-63 + -21x) = -252 Solving -63 + -21x = -252 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '63' to each side of the equation. -63 + 63 + -21x = -252 + 63 Combine like terms: -63 + 63 = 0 0 + -21x = -252 + 63 -21x = -252 + 63 Combine like terms: -252 + 63 = -189 -21x = -189 Divide each side by '-21'. x = 9 Simplifying x = 9
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