If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2(2^n)-9=0
We move all terms containing n to the left, all other terms to the right
22^n=9
n=9/1
n=9
| 1/6(x+1/5)=-17/15 | | 2*2^n-9=0 | | m/14=-17 | | 0=2*2^n-9 | | 61 (x+51 )=−1517 | | 4·(x-1)-7(x-6)=5·(x+6) | | -6(x+7)=84 | | -5(-5k-8)+4=119 | | 120=-8(1+x) | | 4y+19=3y-13 | | 5(3n-2)-2=132 | | 8(-8)=2x+8 | | 42=-2p+6 | | 7(1-5m=-273 | | 7x+2=3x+49 | | 8=x+4x+3x | | 2x²-10x+9=0 | | -5|3x-7|+3=13 | | 5(3n-2)-2=-132 | | -98=7(2r-6) | | -87=-3(1-5n)-n | | 10x-8=6x-10 | | x/4=(x+3)/3 | | x/0,6=25 | | 85=-3(6-7)-5b | | x/10=-0,3 | | 10=8+3(5n+3) | | -2k-8(k+4)=-92 | | 1.1x+1.2x−5.4=−101.1x+1.2x−5.4=−101.1x+1.2x−5.4=−101.1x+1.2x−5.4=−101.1x+1.2x−5.4=−10 | | 174(2-5b)=128 | | 4-5(5x-4)=124 | | 1/x+3=4 |