If it's not what You are looking for type in the equation solver your own equation and let us solve it.
100=0.80x^126
We move all terms to the left:
100-(0.80x^126)=0
We do not support expression: x^126
| (4y=24) | | 10x-107=298 | | 4-7y=-(8y+4)+2 | | 2+8x-6=12x-4 | | 10x-107=107 | | 5(a-3)/8+2=7 | | 9(2x=11)-5-3(x=2)=-290 | | x+44+x+84+70=180 | | (9-2x)=3 | | 2m–7=-13 | | 5d+3=8 | | 3w−7=w-23 | | 4x-82=107 | | 8(2x+2)-5=6(x-1)+23 | | 6v-17=-1 | | 17a-13a=4 | | 3=-x+3-5x | | 4(x–2)=2x–3(x+2 | | 4-10v=-9v | | 1/2(4x+6)=23 | | 6x−7=2x+5 | | 34x−18=10x–9 | | 2x-82=107 | | 2m–7=-13+m | | 1-7v-8=0 | | 12a+5-8a=-7 | | 19x-18=-19×+18 | | x2-6x=-4 | | 42=-2/5n | | 17p+1=18 | | 7u=1+6u | | (5-2x)-11=0 |