Easy one killing me

  • Thread starter thomas576
  • Start date
  • #1
20
1
3z/2=z/6+4

so

i x multiply and get
18z=2z+8
16z=8

z=1/2

this look right?

thanks
 

Answers and Replies

  • #2
arildno
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Unfortunately no; you forgot to multiply your constant with 6 as well
(with the "constant", I mean the lone "4" in your original equation)
 
  • #3
20
1
hmm

ok you lost me /shrug
 
  • #4
arildno
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3z/2=z/6+4
1. Multiply both sides of the equation with 6:
6*(3z/2)=6*(z/6+4)
OR:
18z/2=6z/6+6*4
Or:
9z=z+24
That is:
8z=24
Whereby:
z=3

Note:
I didn't bother with your cross-multiplication; that was an unnecessary operation.
 

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