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Simplifying -2(-9 + 12) = -2x + 7 Combine like terms: -9 + 12 = 3 -2(3) = -2x + 7 Multiply -2 * 3 -6 = -2x + 7 Reorder the terms: -6 = 7 + -2x Solving -6 = 7 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. -6 + 2x = 7 + -2x + 2x Combine like terms: -2x + 2x = 0 -6 + 2x = 7 + 0 -6 + 2x = 7 Add '6' to each side of the equation. -6 + 6 + 2x = 7 + 6 Combine like terms: -6 + 6 = 0 0 + 2x = 7 + 6 2x = 7 + 6 Combine like terms: 7 + 6 = 13 2x = 13 Divide each side by '2'. x = 6.5 Simplifying x = 6.5
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