+0  
 
+3
306
11
avatar+426 

very complicated

5([x-1/2]-1) +2x    =5+x

             3

 

solve for x

 

 

good luck

 Apr 16, 2018
edited by DarkCalculis  Apr 16, 2018
 #1
avatar+3987 
+1

Does x=45/16?

 Apr 16, 2018
 #2
avatar+426 
+1

sorry Tertre the answer is incorrect the number needs to be a whole number

DarkCalculis  Apr 16, 2018
 #3
avatar+3987 
+1

Thanks for telling me! I'll try to work on this more. 

tertre  Apr 16, 2018
 #4
avatar+426 
+1

good luck and have fun

DarkCalculis  Apr 16, 2018
 #5
avatar+98000 
+1

5([x-1/2]-1) +2x    =  5+x

             3

 

Multiply both sides by 3

 

5 ( [ x - 1/2 ] - 1 ) + 2x   =  3(5 + x)

 

5 ( x - 3/2) + 2x  =   15 +  3x

 

5x - 15/2 + 2x   =  15 + 3x

 

7x - 15/2  +  15 + 3x

 

4x  =  15 + 15/2

 

4x    = 45/2

 

x  = (45/2) ( 1/4)   =    45 / 8  

 

 

 

cool cool cool

 Apr 16, 2018
 #6
avatar+426 
0

I'm sorry CPhill you are incorrect the answer is a whole number, not a fraction

DarkCalculis  Apr 16, 2018
 #7
avatar+426 
0

do you all give up??

 Apr 16, 2018
 #8
avatar
0

Are the brackets around x-1/2 the floor function of x-1/2?

ThePuppetMaster  Apr 16, 2018
 #9
avatar+426 
0

well I believe that everyone miss understood its x subtract 1 then divided by 2

x-1

 2

 Apr 16, 2018
 #10
avatar
+1

(5([x-1]/2-1)+2x)/3=5+x / multiply both sides by 3

 

5([x-1]/2-1)+2x=15+3x/ subtract 2x from both sides

 

5([x-1]/2-1)=2.5*x-7.5=15+x/ subtract (x-7.5) fdrom both sides

 

1.5*x=22.5 /divide both sides by 1.5

 

x=15

 

am i right?

ThePuppetMaster  Apr 16, 2018
 #11
avatar+426 
+1

yes you are congrats 

DarkCalculis  Apr 16, 2018

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