

The inequality is
.
Apply subtraction property of inequality: Subtract 15 from each side.
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Apply commutative property of addition: a + b = b + a.
\
(Apply additive inverse property:
)
(Apply additive identity property:
)
(Subtract:
)
Apply division property of inequality: Divide each side by 2.
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(Cancel common terms)
(Divide:
)

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