Let's solve your equation step-by-step.
−
2
x
+
5
=
21
Step 1: Subtract 5 from both sides.
−
2
x
+
5
−
5
=
21
−
5
−
2
x
=
16
Step 2: Divide both sides by -2.
−
2
x
−
2
=
16
−
2
x
=
−
8
Answer:
X=-8
Step 1: Add 2y to both sides.
−
7
x
−
2
y
+
2
y
=
15
+
2
y
−
7
x
=
2
y
+
15
Step 2: Divide both sides by -7.
−
7
x
−
7
=
2
y
+
15
−
7
x
=
−
2
7
y
+
−
15
7
Answer:
x
=
−
2
7
y
+
−
15
7
