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Simplifying 4n + -4(1 + -1n) = -4 + 8n 4n + (1 * -4 + -1n * -4) = -4 + 8n 4n + (-4 + 4n) = -4 + 8n Reorder the terms: -4 + 4n + 4n = -4 + 8n Combine like terms: 4n + 4n = 8n -4 + 8n = -4 + 8n Add '4' to each side of the equation. -4 + 4 + 8n = -4 + 4 + 8n Combine like terms: -4 + 4 = 0 0 + 8n = -4 + 4 + 8n 8n = -4 + 4 + 8n Combine like terms: -4 + 4 = 0 8n = 0 + 8n 8n = 8n Add '-8n' to each side of the equation. 8n + -8n = 8n + -8n Combine like terms: 8n + -8n = 0 0 = 8n + -8n Combine like terms: 8n + -8n = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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