-3x-2=19
move -2 to the other side
sign changes from -2 to +2
-3x-2+2=19+2
-3x=19+2
-3x=21
divide both sides -3 to get +x
-3x/-3=21/-3
Cross out -3 and -3, divide by 3 and then becomes -1*-1*x=x
divide by 3 for 21/-3
21/3=7
-3/3=-1
7*-1=-7
Answer:
x=-7