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Simplifying 3 + 2x + -1(x + 7) = 2x + n Reorder the terms: 3 + 2x + -1(7 + x) = 2x + n 3 + 2x + (7 * -1 + x * -1) = 2x + n 3 + 2x + (-7 + -1x) = 2x + n Reorder the terms: 3 + -7 + 2x + -1x = 2x + n Combine like terms: 3 + -7 = -4 -4 + 2x + -1x = 2x + n Combine like terms: 2x + -1x = 1x -4 + 1x = 2x + n Reorder the terms: -4 + 1x = n + 2x Solving -4 + 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. -4 + 1x + -2x = n + 2x + -2x Combine like terms: 1x + -2x = -1x -4 + -1x = n + 2x + -2x Combine like terms: 2x + -2x = 0 -4 + -1x = n + 0 -4 + -1x = n Add '4' to each side of the equation. -4 + 4 + -1x = 4 + n Combine like terms: -4 + 4 = 0 0 + -1x = 4 + n -1x = 4 + n Divide each side by '-1'. x = -4 + -1n Simplifying x = -4 + -1n
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