If (5^13)(9^7)=3(15^x), what is the value of x?  Select
A) 7	B) 9	C) 11	D) 13	E) 15
(5^13)(9^7)=3(15^x)   =&gt; 5^13 * 3^14 = 3 * 3^x * 5^x   =&gt; 5^13 * 3^14 = 3^(x+1) * 5^x   Value of x = 13   Answer 13
<result>D</result>
If (5^13)(9^7)=3(15^x), what is the value of x?