SOLUTION: Can you please help me solve: 2.9^a-4 =8.1 ?

Question 719397: Can you please help me solve: 2.9^a-4 =8.1 ?
Found 2 solutions by Alan3354, tv96:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
2.9^a-4 =8.1
Add 4
2.9^a = 12.1
---
a*log(2.9) = log(12.1)
a = log(12.1)/log(2.9)

Answer by tv96(8) (Show Source): You can put this solution on YOUR website!
First, do Log of 2.9 on both sides.
-this will isolate the a-4.
The equation would then be a-4=1.96
Add 4 on both sides; answer will be: 5.96
RELATED QUESTIONS
Can you please help me solve this algebra problems. 2=6(b+4) 3(k-1)=7+11... (answered by Fombitz)
Can you please help me solve my problem?... (answered by checkley71)
Can you help me solve this equation please? 1. 9/x = 4/3x + 1 x = ? (answered by ankor@dixie-net.com)
Solve for the unknown variable: a)sqrt9^x=27 b)8^(1/2x)=(2^7)*(4^9) c)sqrt125^x=5/25^x (answered by solver91311)
can you please help me slove this equation: -8-2*(-9)-4(5-3)=2 (answered by jim_thompson5910)
can you please help me to Solve the equation 3/2 minus 1/x-4 = -2/... (answered by lwsshak3)
Solve the following a) log(base 8)(x+9) - log(base 8)(x-1) = 1/3 Can you please... (answered by lwsshak3)
Can you please help me solve this problem? -8(1/4t - 4)= 12 -... (answered by Edwin McCravy)
Can you help me solve this? 4/5x +9 =... (answered by checkley71)
Can you please help me solve this: 2 (x + 4) =... (answered by jim_thompson5910)