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Simplifying -7(7x + 9) = -455 Reorder the terms: -7(9 + 7x) = -455 (9 * -7 + 7x * -7) = -455 (-63 + -49x) = -455 Solving -63 + -49x = -455 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 + -49x = -455 + 63 Combine like terms: -63 + 63 = 0 0 + -49x = -455 + 63 -49x = -455 + 63 Combine like terms: -455 + 63 = -392 -49x = -392 Divide each side by '-49'. x = 8 Simplifying x = 8
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