
\
The equation is 
Multiplication property of equality if
then 
(Multiply each side by 3)
(Cancel common terms)
(Multiply:
)
(Add 8 to each side)
(Additive inverse property:
)
(Add:
) \ \
Check:
\Substitutive the value
on original equation

(Subtract:
)
(Divide:
) \ \
The solution
.