September 21st, 2013, 02:52 PM  #1 
Newbie Joined: Sep 2013 Posts: 2 Thanks: 0  Exponential
Hi guys, need help with... (185^x)/5^x =5^x+2 
September 21st, 2013, 03:01 PM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,958 Thanks: 1146 Math Focus: Elementary mathematics and beyond  Re: Exponential 
September 21st, 2013, 03:07 PM  #3 
Newbie Joined: Sep 2013 Posts: 2 Thanks: 0  Re: Exponential
Why did you write 5^2x and 3? Where did they come from?

September 21st, 2013, 05:15 PM  #4 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,958 Thanks: 1146 Math Focus: Elementary mathematics and beyond  Re: Exponential
I multiplied both sides of your equation by 5^x and then rearranged the terms. 5^x + 2 * 5^x = 3 * 5^x. When multiplying exponentials with the same base, add the exponents: 5^x * 5^x = 5^(x + x) = 5^(2x). 

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