The inequality is .
Apply subtraction property of inequality: Subtract 13 from each side.
\Apply commutative property of addition: .
(Apply Additive inverse property:
)
(Apply Additive identity property:
)
(Subtract:
)
\
Apply division property of inequality: Divide each side by 4.
\ (Cancel common terms)
(Divide:
)
(Multiply each side by negative one and flip the symbol)
(Product of two same signs is positive)
The solution set is
Graph the solution set on a number line.
Note: A dot means that this point is included in the solution set.
The solution set is .
The graph is
\