Answer is x=4cd-2d/3ac
Step 1: Multiply both sides by c.
3
a
c
x
+
2
b
=
4
c
d
Step 2: Add -2b to both sides.
3
a
c
x
+
2
b
+
−
2
b
=
4
c
d
+
−
2
b
3
a
c
x
=
4
c
d
−
2
b
Step 3: Divide both sides by 3ac.
3
a
c
x
3
a
c
=
4
c
d
−
2
b
3
a
c
x
=
4
c
d
−
2
b
3
a
c