

The inequality is
.
(Apply distributive property: a (b + c) = ab + ac).
(Multiply:
)
Apply addition property of inequality: Add 21n to each side.
\
Apply commutative property of addition: a + b = b + a.
\
(Apply additive inverse property:
)
(Apply additive identity property:
)
(Add:
)
Apply division property of inequality: Divide each side by 27.
\
(Cancel common terms)
(Divide:
)

Graph the solution set on a number line.
Note: A circle means that this point is not included in the solution set.
The inequality solution set is
.