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Simplifying -7x + 4(-5x + 12) = -87 Reorder the terms: -7x + 4(12 + -5x) = -87 -7x + (12 * 4 + -5x * 4) = -87 -7x + (48 + -20x) = -87 Reorder the terms: 48 + -7x + -20x = -87 Combine like terms: -7x + -20x = -27x 48 + -27x = -87 Solving 48 + -27x = -87 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-48' to each side of the equation. 48 + -48 + -27x = -87 + -48 Combine like terms: 48 + -48 = 0 0 + -27x = -87 + -48 -27x = -87 + -48 Combine like terms: -87 + -48 = -135 -27x = -135 Divide each side by '-27'. x = 5 Simplifying x = 5
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