Divide both sides by -2
4 - 5x = -68/-2
Two negatives make a positive
4 - 5x = 68/2
Simplify 68/2 to 34
4 - 5x = 34
Subtract 4 from both sides
-5x = 34 - 4
Simplify 34 - 4 to 30
-5x = 30
Divide both sides by -5
x = -30/5
Simplify 30/5 to 6
x = -6