SOLUTION: Exponential/Logarithmic Equations: Follow the directions of these equations. Solve 3^x plus 2 = 81

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Exponential/Logarithmic Equations: Follow the directions of these equations. Solve 3^x plus 2 = 81       Log On


   

Question 981294: Exponential/Logarithmic Equations: Follow the directions of these equations.
Solve 3^x plus 2 = 81
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

+3%5E%28x%2B2%29+=+81
+3%5E%28x%2B2%29+=+9%2A9
+3%5E%28x%2B2%29+=3%5E2%2A3%5E2
+3%5E%28x%2B2%29+=+3%5E4....if bases same, exponents are same too; so, we have
%28x%2B2%29+=+4...solve for x
x+=+4-2
x+=+2