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Simplifying -5(4x + 2) + 21x = 12 Reorder the terms: -5(2 + 4x) + 21x = 12 (2 * -5 + 4x * -5) + 21x = 12 (-10 + -20x) + 21x = 12 Combine like terms: -20x + 21x = 1x -10 + 1x = 12 Solving -10 + 1x = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + 1x = 12 + 10 Combine like terms: -10 + 10 = 0 0 + 1x = 12 + 10 1x = 12 + 10 Combine like terms: 12 + 10 = 22 1x = 22 Divide each side by '1'. x = 22 Simplifying x = 22
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