Solve for kkk. \dfrac{k}{6} = \dfrac{4}{3} 6 k = 3 4 start fraction, k, divided by, 6, end fraction, equals, start fraction, 4, divided by, 3, end fraction k =k=k, equals

The equation which represents the people that want to visit the museum and the exhibit is 8n+5n.
As you can see, the variable n is present in both terms 8n and 5n of the equation, so we can now factor the equation. You create parenthesis in which you put inside 8+5 and then you throw the variable n outside the parenthesis, and you get at last:
8n + 5n = (8+5)n

Hope this helps! :D