Answer:
b = 5
Explanation:
Whatever you do to one side, you must do to the other side in order to make the equation stay true.
1. Subtract 22 from both sides.
-3b + 22 - 22 = 7 - 22
-3b = -15
2. Divide both sides by -3.
-3b/-3 = -15/-3
b = 5
^ That's the final answer!