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Simplifying 4 + -4(2x + -4) = -20 Reorder the terms: 4 + -4(-4 + 2x) = -20 4 + (-4 * -4 + 2x * -4) = -20 4 + (16 + -8x) = -20 Combine like terms: 4 + 16 = 20 20 + -8x = -20 Solving 20 + -8x = -20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -8x = -20 + -20 Combine like terms: 20 + -20 = 0 0 + -8x = -20 + -20 -8x = -20 + -20 Combine like terms: -20 + -20 = -40 -8x = -40 Divide each side by '-8'. x = 5 Simplifying x = 5
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