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Simplifying -5x + -3(-7x + -6) = -142 Reorder the terms: -5x + -3(-6 + -7x) = -142 -5x + (-6 * -3 + -7x * -3) = -142 -5x + (18 + 21x) = -142 Reorder the terms: 18 + -5x + 21x = -142 Combine like terms: -5x + 21x = 16x 18 + 16x = -142 Solving 18 + 16x = -142 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + 16x = -142 + -18 Combine like terms: 18 + -18 = 0 0 + 16x = -142 + -18 16x = -142 + -18 Combine like terms: -142 + -18 = -160 16x = -160 Divide each side by '16'. x = -10 Simplifying x = -10
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