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if 18=n−1818=n-18, what's the value of nn?

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Full solution

Q. if 18=n−1818=n-18, what's the value of nn?
  1. Add 1818 to isolate variable: Add 1818 to both sides of the equation to isolate the variable nn.18=n−1818 = n - 1818+18=n−18+1818 + 18 = n - 18 + 18
  2. Combine like terms: Combine like terms on both sides of the equation.\newline36=n36 = n
  3. Check solution: Check the solution by substituting the value of nn back into the original equation.18=36−1818 = 36 - 1818=1818 = 18

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