The inequality is
.
Apply addition property of inequality:
.
(Add 7 to each side)
(Apply additive inverse property:
)
(Apply additive identity property:
)
(Add:
)

The solution set is
.
Graph the solution set on a number line.
Note:
\The point indicated with the closed circle is included the solution set.
\The graph of
is

The inequality solution set is
.