karolynxx
  • karolynxx
What is the value of x in the equation 3x –1/9 y = 18, when y = 27? a)5 b)7 c)45 d)63
Mathematics
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SOLVED
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katieb
  • katieb
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karolynxx
  • karolynxx
@freckles help?
freckles
  • freckles
have you replace y with 27?
freckles
  • freckles
also that says: \[3x-\frac{1}{9}y=18\]

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More answers

freckles
  • freckles
\[3x-\frac{1}{9}(27)=18 \text{ since } y=27\] we solve for x now
freckles
  • freckles
let me know if you do not know how to do that and I can give you the first step
karolynxx
  • karolynxx
so i do 1/9 x 27
freckles
  • freckles
also known as 27/9
karolynxx
  • karolynxx
27/9 = 3
freckles
  • freckles
yes
freckles
  • freckles
3x-3=18
karolynxx
  • karolynxx
So do i plug that in somewhere
freckles
  • freckles
you want to isolate the 3x term do this by adding 3 on both sides 3x-3=18 3x-3+3=18+3 3x+0=18+3 3x=21
freckles
  • freckles
now there is one last step
karolynxx
  • karolynxx
21/3?
freckles
  • freckles
yep
karolynxx
  • karolynxx
7!
freckles
  • freckles
yes
freckles
  • freckles
actually just 7 but I know what you mean 7! actually means 7*6*5*4*3*2*1 :p
karolynxx
  • karolynxx
Lol :-)
karolynxx
  • karolynxx
What is the value of x in the equation 7x + 2y = 48 , when y = 3?
freckles
  • freckles
so first step replace y with 3
karolynxx
  • karolynxx
7x + 2(3) =48 &x + 6=48
freckles
  • freckles
right 7x+6=48
karolynxx
  • karolynxx
so then id - 6 on both sides?
freckles
  • freckles
then two more steps
freckles
  • freckles
yes
freckles
  • freckles
one more after
karolynxx
  • karolynxx
so 42 then divode by 7?
freckles
  • freckles
yep
freckles
  • freckles
And karol I sleep now
freckles
  • freckles
good luck on your math
karolynxx
  • karolynxx
Thanks!
freckles
  • freckles
welcome :)

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