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Simplifying -7(-1n + 1) = 12 + 7n Reorder the terms: -7(1 + -1n) = 12 + 7n (1 * -7 + -1n * -7) = 12 + 7n (-7 + 7n) = 12 + 7n Add '-7n' to each side of the equation. -7 + 7n + -7n = 12 + 7n + -7n Combine like terms: 7n + -7n = 0 -7 + 0 = 12 + 7n + -7n -7 = 12 + 7n + -7n Combine like terms: 7n + -7n = 0 -7 = 12 + 0 -7 = 12 Solving -7 = 12 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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