If x and b are integers and (15^x + 15^(x+1))/4^b = 15^b what is the value of x? Pick
A) 2  B) 3  C) 4  D) 5  E) Cannot be determined
\frac{15^x( 1+ 15)}{4^b} = 15^b   (15^x . 4^2 ) / 4^b = 15^b. 4^0   15^x . 4^(2-b) = 15^b. 4^0   Equating the powers, x = b; 2-b = 0; So x = b = 2=2
<result>A</result>
If x and b are integers and (15^x + 15^(x+1))/4^b = 15^b what is the value of x?