Final Answer: No Solution. The equation would have 0 solutions.
Steps/Explanations:
Hey there! The answer is No Solution because -7 = 7. If 7 = 7, then it would be true and have one solution, which is not the case here. 
Step 1: You should cancel 
 on both sides.
 on both sides.

Step 2: Simplify 
 to
 to 
 .
.

Step 3: Simplify 
 to
 to 
 .
.

Step 4: You'll need to cancel 
 on both sides.
 on both sides.

Step 5: Since 
 is false, there would be no solution.
 is false, there would be no solution.
No Solution
~I hope I helped you :)~