Log3(6)+log3(18)-log3(4)=log3(6*18/4)=log3(27)=log3(3^3)=3log3(3)=3
log2(4x+5)=log2(9-2x) 4x+5=9-2x 6x=4 x=2/3
log0.6(x^2-3x-9)=0 x^2-3x-9=0.6^0 x^2-3x-9=1 x^2-3x-10=0 x1=5 x2=-2
log1/3(x^2+3x-9)=-2 x^2+3x-9=(1/3)^(-2) x^2+3x-9=9 x^2+3x-18=0 x1=-6 x2=3