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Simplifying -3(-2 + 4) + 7x = 21 Combine like terms: -2 + 4 = 2 -3(2) + 7x = 21 Multiply -3 * 2 -6 + 7x = 21 Solving -6 + 7x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + 7x = 21 + 6 Combine like terms: -6 + 6 = 0 0 + 7x = 21 + 6 7x = 21 + 6 Combine like terms: 21 + 6 = 27 7x = 27 Divide each side by '7'. x = 3.857142857 Simplifying x = 3.857142857
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