The equation is .
(Apply distributive property:
)
(Multiply:
)
(Add 9 to each side)
(Apply additive inverse property:
)
(Apply additive inverse property:
)
(Add:
)
(Divide each side by 3)
(Cancel common terms)
(Divide:
)
Check:
\To check the solution, substitute in the original equation.
(Substitute
)
(Subtract:
)
(Multiply:
)
The equality is true.
The solution is .