Answer :
[tex]y-12=4y\ \ \ |Add\ 12\ to\ both\ sides\\\\
y-12+12=4y+12\\\\
y=4y+12\ \ \ |Subtract\ 4y\ from\ both\ sides\\\\
y-4y=12\\\\
-3y=12\ \ \ |Divide\ by\ -3\ both\ sides\\\\
y=-4\\\\
\textbf{Solution\ is\ y=-4.} [/tex]
-- Subtract ' Y ' from each side of the equation.
-- Then divide each side by 3, and the answer will jump out at you.
-- Then divide each side by 3, and the answer will jump out at you.