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Simplifying -1(x + 13) = 8 Reorder the terms: -1(13 + x) = 8 (13 * -1 + x * -1) = 8 (-13 + -1x) = 8 Solving -13 + -1x = 8 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + -1x = 8 + 13 Combine like terms: -13 + 13 = 0 0 + -1x = 8 + 13 -1x = 8 + 13 Combine like terms: 8 + 13 = 21 -1x = 21 Divide each side by '-1'. x = -21 Simplifying x = -21
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