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Simplifying -5(-6 + 7x) = -390 (-6 * -5 + 7x * -5) = -390 (30 + -35x) = -390 Solving 30 + -35x = -390 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 + -35x = -390 + -30 Combine like terms: 30 + -30 = 0 0 + -35x = -390 + -30 -35x = -390 + -30 Combine like terms: -390 + -30 = -420 -35x = -420 Divide each side by '-35'. x = 12 Simplifying x = 12
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