Set up the composite result function.
f
(
g
(
x
)
)
Evaluate
f
(
g
(
x
)
)
by substituting in the value of
g
into
f
.
f
(
2
x
+
1
)
=
3
(
2
x
+
1
)
−
5
Simplify each term.
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f
(
2
x
+
1
)
=
6
x
+
3
−
5
Subtract
5
from
3
.
f
(
2
x
+
1
)
=
6
x
−
2
