6+1x= 7 ::::::::::::::::::::::::::::::::::
Answer:
Option A. 
Step-by-step explanation:
we know that
In the right triangle MNL
Applying the Pythagoras Theorem

substitute the values


C = what ever the algebraic pharse is standing for c can equal to what ever number there is
Set up the equation in long division form with x-5 outside of the box. Then you want to input the values as you go. Let me know if you want me to clarify my steps.