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Simplifying -2(3x + -8) + -13 = -21 Reorder the terms: -2(-8 + 3x) + -13 = -21 (-8 * -2 + 3x * -2) + -13 = -21 (16 + -6x) + -13 = -21 Reorder the terms: 16 + -13 + -6x = -21 Combine like terms: 16 + -13 = 3 3 + -6x = -21 Solving 3 + -6x = -21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -6x = -21 + -3 Combine like terms: 3 + -3 = 0 0 + -6x = -21 + -3 -6x = -21 + -3 Combine like terms: -21 + -3 = -24 -6x = -24 Divide each side by '-6'. x = 4 Simplifying x = 4
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