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Simplifying 7n + -8(n + -2) = -20n + 16 + 19n Reorder the terms: 7n + -8(-2 + n) = -20n + 16 + 19n 7n + (-2 * -8 + n * -8) = -20n + 16 + 19n 7n + (16 + -8n) = -20n + 16 + 19n Reorder the terms: 16 + 7n + -8n = -20n + 16 + 19n Combine like terms: 7n + -8n = -1n 16 + -1n = -20n + 16 + 19n Reorder the terms: 16 + -1n = 16 + -20n + 19n Combine like terms: -20n + 19n = -1n 16 + -1n = 16 + -1n Add '-16' to each side of the equation. 16 + -16 + -1n = 16 + -16 + -1n Combine like terms: 16 + -16 = 0 0 + -1n = 16 + -16 + -1n -1n = 16 + -16 + -1n Combine like terms: 16 + -16 = 0 -1n = 0 + -1n -1n = -1n Add 'n' to each side of the equation. -1n + n = -1n + n Combine like terms: -1n + n = 0 0 = -1n + n Combine like terms: -1n + n = 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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