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Simplifying 7(2x + -2) = 21 Reorder the terms: 7(-2 + 2x) = 21 (-2 * 7 + 2x * 7) = 21 (-14 + 14x) = 21 Solving -14 + 14x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + 14x = 21 + 14 Combine like terms: -14 + 14 = 0 0 + 14x = 21 + 14 14x = 21 + 14 Combine like terms: 21 + 14 = 35 14x = 35 Divide each side by '14'. x = 2.5 Simplifying x = 2.5
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