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Simplifying -5x + 3(-3x + -10) = -142 Reorder the terms: -5x + 3(-10 + -3x) = -142 -5x + (-10 * 3 + -3x * 3) = -142 -5x + (-30 + -9x) = -142 Reorder the terms: -30 + -5x + -9x = -142 Combine like terms: -5x + -9x = -14x -30 + -14x = -142 Solving -30 + -14x = -142 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + -14x = -142 + 30 Combine like terms: -30 + 30 = 0 0 + -14x = -142 + 30 -14x = -142 + 30 Combine like terms: -142 + 30 = -112 -14x = -112 Divide each side by '-14'. x = 8 Simplifying x = 8
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