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Simplifying -23 = -2(x + 1) + 9 Reorder the terms: -23 = -2(1 + x) + 9 -23 = (1 * -2 + x * -2) + 9 -23 = (-2 + -2x) + 9 Reorder the terms: -23 = -2 + 9 + -2x Combine like terms: -2 + 9 = 7 -23 = 7 + -2x Solving -23 = 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. -23 + 2x = 7 + -2x + 2x Combine like terms: -2x + 2x = 0 -23 + 2x = 7 + 0 -23 + 2x = 7 Add '23' to each side of the equation. -23 + 23 + 2x = 7 + 23 Combine like terms: -23 + 23 = 0 0 + 2x = 7 + 23 2x = 7 + 23 Combine like terms: 7 + 23 = 30 2x = 30 Divide each side by '2'. x = 15 Simplifying x = 15
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