x + 5 = -7
Subtract 5 from both sides of the equation to find x.
By doing so, you will isolate the variable x.
To isolate a variable means to solve for that variable.
x - 5 + 5 = -7 - 5
x = -12
THE PROVE:
Let's now go back to the original question to replace x with -12.
If we get the same answer on both sides, then we know that x = -12 is right.
You were given x + 5 = -7.
Let x = -12
-12 + 5 = -7
-7 = -7...IT CHECKS!!!
Therefore, x = -12 is correct.
