The equation is
.
(Divide each side by 4)

Case 1 Case 2
\
(Subtract 2 from each side)
(Divide each side by 7)
Case 2
\
Subtract 2 from each side
\
Divide each side by 7

The solutions are -1/4 and -9/28.
Check:
\To check, substitute
in the original equation
.
(Substitute
)



To check, substitute
in the original equation
.



The solution set is
.