1/4-2/3y=3/4-1/3y

1/4-2/3y=3/4-1/3y

1/4 - 3/4 = 1/3y

-1/2 = 1/3y

(-1/2)/(1/3) = y

(-1/2) * 3 = y

-1 1/2 = y