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Simplifying -10n + 21 = 5(-2n + 1) Reorder the terms: 21 + -10n = 5(-2n + 1) Reorder the terms: 21 + -10n = 5(1 + -2n) 21 + -10n = (1 * 5 + -2n * 5) 21 + -10n = (5 + -10n) Add '10n' to each side of the equation. 21 + -10n + 10n = 5 + -10n + 10n Combine like terms: -10n + 10n = 0 21 + 0 = 5 + -10n + 10n 21 = 5 + -10n + 10n Combine like terms: -10n + 10n = 0 21 = 5 + 0 21 = 5 Solving 21 = 5 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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