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Simplifying -1(n + 7) = -1n + 21 Reorder the terms: -1(7 + n) = -1n + 21 (7 * -1 + n * -1) = -1n + 21 (-7 + -1n) = -1n + 21 Reorder the terms: -7 + -1n = 21 + -1n Add 'n' to each side of the equation. -7 + -1n + n = 21 + -1n + n Combine like terms: -1n + n = 0 -7 + 0 = 21 + -1n + n -7 = 21 + -1n + n Combine like terms: -1n + n = 0 -7 = 21 + 0 -7 = 21 Solving -7 = 21 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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