Answer:
[tex]x= -3\\[/tex]
Step-by-step explanation:
[tex]6x-3=-18+x\\minus x on both sides\\6x-x=5x\\5x-3= -18\\plus 3 on both sides\\5x= -15\\divide by 5 on both sides\\\frac{-15}{5} =-3\\x=-3[/tex]