If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.3^x=8
We move all terms to the left:
0.3^x-(8)=0
We move all terms containing x to the left, all other terms to the right
0.3^x=8
x=8/1
x=8
| 8+2v-v=-10-v | | 3x-2x+1=6x+2-5x | | 15z+3z-11z-4z=12 | | 20x+9=129 | | 37=2+5u | | 7(4r-7)=175 | | −36=n/4 | | x+12+x=46 | | F(10)=5x+6 | | 36=n/4 | | 14=g/4+10 | | y-47=108 | | 4z-3+3z-1=76 | | |6x+8|=-26 | | 4z+z+3z=8 | | -6+u/2=-2 | | 3.5*x=60 | | 2y-1*3y-3=102 | | 13=2v+3 | | 9c-3c+3c+4c-7c=18 | | -4x-4x-11=-5 | | 8(11-w)=16 | | C(x)=2x^2-200x+16000 | | 80xx=90 | | 4|5-x|=20 | | 105+x=170 | | 3x•7=36 | | 12+42=t | | 3+a=40 | | 9+3m-6=-9-m | | 3x(7)=36 | | 1=3+x/16 |