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Simplifying -12(x + -4) = -138 Reorder the terms: -12(-4 + x) = -138 (-4 * -12 + x * -12) = -138 (48 + -12x) = -138 Solving 48 + -12x = -138 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-48' to each side of the equation. 48 + -48 + -12x = -138 + -48 Combine like terms: 48 + -48 = 0 0 + -12x = -138 + -48 -12x = -138 + -48 Combine like terms: -138 + -48 = -186 -12x = -186 Divide each side by '-12'. x = 15.5 Simplifying x = 15.5
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