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Simplifying -21 + 8n = 4(2n + -7) Reorder the terms: -21 + 8n = 4(-7 + 2n) -21 + 8n = (-7 * 4 + 2n * 4) -21 + 8n = (-28 + 8n) Add '-8n' to each side of the equation. -21 + 8n + -8n = -28 + 8n + -8n Combine like terms: 8n + -8n = 0 -21 + 0 = -28 + 8n + -8n -21 = -28 + 8n + -8n Combine like terms: 8n + -8n = 0 -21 = -28 + 0 -21 = -28 Solving -21 = -28 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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