The inequality is
Apply substration property of inequality: Subtract 12 from each side.
\
(Commutative property of addition:
)
(Additive inverse property:
)
(Subtract:
)
Graph the solution set on a number line
Note: A dot means that this point is included in the solution set.
Check:
\To check, substitute -4 less than or equal to -4 in
(Substitute
)
(Subtract:
)
The inequality is true.
The inequality solution is .