4(3-6a)=36 4(3-6a)/4=36/4 divide by 4 on both sides 3-6a-3=9-3 subtract 3 on both sides -6a/-6=6/-6 divide by -6 on both sides a=-1 solution

4(3-6a)=36 12-24a=36 -24a=24 a=-1