The equation is 
Division property of equality:
\ Any numbers a, b and c, with
, if
then 
(Divide each side by 2)
(Cancel common terms)
(Divide :
)
Check:
\To check the solution, substitute
in original equation.
(Substitute
)
(Multiply:
)
Compare the values, the equation is true. The solution is
.
The solution is
.