Question 448341
9[n+2(n-2)]=45 ... Start with the given equation.



{{{9n+18(n-2)=45}}} Distribute.



{{{9n+18n-36=45}}} Distribute again.



{{{27n-36=45}}} Combine like terms on the left side.



{{{27n=45+36}}} Add {{{36}}} to both sides.



{{{27n=81}}} Combine like terms on the right side.



{{{n=(81)/(27)}}} Divide both sides by {{{27}}} to isolate {{{n}}}.



{{{n=3}}} Reduce.



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Answer:


So the solution is {{{n=3}}}