Add 3 to both sides: -42=6n.
Divide both sides by 6: n=-7
Plug n back into the original equation: 6(-7)-3=-45.
-42-3=-45.
-45=-45.
Add 3 to both sides: -42=6n.
Divide both sides by 6: n=-7
Plug n back into the original equation: 6(-7)-3=-45.
-42-3=-45.
-45=-45.