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+0  
 
+1
172
4
avatar+105 

(  23x · 8x+5  ) / 16x-1    =   √2x-1

 

I keep getting -17/3, but apparently the answer is -9??? :///

 Jun 2, 2019
 #1
avatar+25 
-3

can i see your work? i might be able to help

 Jun 2, 2019
 #2
avatar+25 
-4

try canceling. di you do that>wink

ProffesorNobody  Jun 2, 2019
 #3
avatar+28233 
+5

As follows:

 

The answer is clearly not -9:

 Jun 2, 2019
 #4
avatar
+1

I AGREE WITH ALAN:

 

Solve for x over the real numbers:
2^(2 x + 19) = 2^((x - 1)/2)

Take the natural logarithm of both sides and use the identity log(a^b) = b log(a):
log(2) (2 x + 19) = 1/2 log(2) (x - 1)

Divide both sides by log(2):
2 x + 19 = (x - 1)/2

Expand out terms of the right hand side:
2 x + 19 = x/2 - 1/2

Subtract x/2 + 19 from both sides:
(3 x)/2 = -39/2

Multiply both sides by 2/3:
 x = -13

 Jun 2, 2019

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