Answer :
Let's solve for x.
6
x
+
z
=
21
Step 1: Add -z to both sides.
6
x
+
z
+
−
z
=
21
+
−
z
6
x
=
−
z
+
21
Step 2: Divide both sides by 6.
6
x
6
=
−
z
+
21
6
x
=
−
1
6
z
+
7
2
Answer:
x
=
−
1
6
z
+
7
2
6
x
+
z
=
21
Step 1: Add -z to both sides.
6
x
+
z
+
−
z
=
21
+
−
z
6
x
=
−
z
+
21
Step 2: Divide both sides by 6.
6
x
6
=
−
z
+
21
6
x
=
−
1
6
z
+
7
2
Answer:
x
=
−
1
6
z
+
7
2