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Simplifying -6x + 3(43 + -5x) = -30 -6x + (43 * 3 + -5x * 3) = -30 -6x + (129 + -15x) = -30 Reorder the terms: 129 + -6x + -15x = -30 Combine like terms: -6x + -15x = -21x 129 + -21x = -30 Solving 129 + -21x = -30 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-129' to each side of the equation. 129 + -129 + -21x = -30 + -129 Combine like terms: 129 + -129 = 0 0 + -21x = -30 + -129 -21x = -30 + -129 Combine like terms: -30 + -129 = -159 -21x = -159 Divide each side by '-21'. x = 7.571428571 Simplifying x = 7.571428571
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