3
+
9
x
+
4
=
18
Step 1: Simplify both sides of the equation.
3
+
9
x
+
4
=
18
(
9
x
)
+
(
3
+
4
)
=
18
(Combine Like Terms)
9
x
+
7
=
18
9
x
+
7
=
18
Step 2: Subtract 7 from both sides.
9
x
+
7
−
7
=
18
−
7
9
x
=
11
Step 3: Divide both sides by 9.
9
x
9
=
11
9
x
=
11
9
Answer: x = 11/9
