(9)
1/4x-1/2=(-1/4x)-1/6
lets simplify by moving the numbers so the variables are on one side and the numbers are on the other so that it looks like this
1/2x=1/3
divide
x=2/3
(12)
(-1/4x)+1/6=1/6x-1/9
same thing as last time
(-5/12x)=5/18
x=(-90/60)
x=(-1 1/2)
x=(-1.5)