The inequality .
Combine like terms using distributive property: .
(Subtract:
)
Apply additon property of inequality: Add 4 to each side.
\ (Apply additive inverse property:
)
(Appy additive identity property: a + 0 = a)
Apply Additon property of inequality: Add 3d to each side.
\
(Apply additive inverse property:
)
(Add: 3d + 3d = 6d) \ \
(Divide each side by 6)
(Cancel common terms)
(Divide:
)
All real numbers are solutions because is true.
The inequality solution set is .