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Simplifying 2x + -1(4 + 4x) = 12 2x + (4 * -1 + 4x * -1) = 12 2x + (-4 + -4x) = 12 Reorder the terms: -4 + 2x + -4x = 12 Combine like terms: 2x + -4x = -2x -4 + -2x = 12 Solving -4 + -2x = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -2x = 12 + 4 Combine like terms: -4 + 4 = 0 0 + -2x = 12 + 4 -2x = 12 + 4 Combine like terms: 12 + 4 = 16 -2x = 16 Divide each side by '-2'. x = -8 Simplifying x = -8
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