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Simplifying 3 + 2x + -1(x + 9) = 2x + n Reorder the terms: 3 + 2x + -1(9 + x) = 2x + n 3 + 2x + (9 * -1 + x * -1) = 2x + n 3 + 2x + (-9 + -1x) = 2x + n Reorder the terms: 3 + -9 + 2x + -1x = 2x + n Combine like terms: 3 + -9 = -6 -6 + 2x + -1x = 2x + n Combine like terms: 2x + -1x = 1x -6 + 1x = 2x + n Reorder the terms: -6 + 1x = n + 2x Solving -6 + 1x = n + 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 + 1x + -2x = n + 2x + -2x Combine like terms: 1x + -2x = -1x -6 + -1x = n + 2x + -2x Combine like terms: 2x + -2x = 0 -6 + -1x = n + 0 -6 + -1x = n Add '6' to each side of the equation. -6 + 6 + -1x = 6 + n Combine like terms: -6 + 6 = 0 0 + -1x = 6 + n -1x = 6 + n Divide each side by '-1'. x = -6 + -1n Simplifying x = -6 + -1n
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