Here, we are basically solving for x to find it's value:
Subtract 88 from both sides:
[tex]-4x + 88-88 = -12-88
[/tex]
Now we have:
[tex]-4x=-100
[/tex]
divide both sides by -4
x=25
Final answer x=25
To check:
Plug in 25 for x:
-4(25) + 88 = -12
-12=-12 TRUE.