+0

# having trouble

+3
353
11
+420

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
+4228
+1

Does x=45/16?

Apr 16, 2018
#2
+420
+1

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

DarkCalculis  Apr 16, 2018
#3
+4228
+1

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

tertre  Apr 16, 2018
#4
+420
+1

good luck and have fun

DarkCalculis  Apr 16, 2018
#5
+100588
+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

Apr 16, 2018
#6
+420
0

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

DarkCalculis  Apr 16, 2018
#7
+420
0

do you all give up??

Apr 16, 2018
#8
0

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

ThePuppetMaster  Apr 16, 2018
#9
+420
0

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

x-1

2

Apr 16, 2018
#10
+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
+420
+1

yes you are congrats

DarkCalculis  Apr 16, 2018