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Simplifying 3x + -4(5x + 7) = -130 Reorder the terms: 3x + -4(7 + 5x) = -130 3x + (7 * -4 + 5x * -4) = -130 3x + (-28 + -20x) = -130 Reorder the terms: -28 + 3x + -20x = -130 Combine like terms: 3x + -20x = -17x -28 + -17x = -130 Solving -28 + -17x = -130 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + -17x = -130 + 28 Combine like terms: -28 + 28 = 0 0 + -17x = -130 + 28 -17x = -130 + 28 Combine like terms: -130 + 28 = -102 -17x = -102 Divide each side by '-17'. x = 6 Simplifying x = 6
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