Simple...
you have: [tex] \sqrt{5k} +2+8=11[/tex]
-->>Isolate the variable...
[tex] \sqrt{5k} +2+8=11[/tex]
[tex] \sqrt{5k} +10=11[/tex]
[tex] \sqrt{5k} +10=11[/tex]
-10 -10
[tex] \sqrt{5k} =1[/tex]
What is the opposite of square root? [tex] (x)^{2} [/tex]
[tex] \sqrt{5k} ^{2} = 1^{2} [/tex]
5k=1
Now simply divide-->>
k=[tex] \frac{1}{5} [/tex]
Thus, your answer.
