anonymous
  • anonymous
Medal If y = 5x +8 , write x= f (y)
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
y = 5x +8 Subtract -5x from both sides -5x + y = 8 Subtract y from both sides -5x = -y +8 Divide both sides by -5 That should give you your answer. :)
anonymous
  • anonymous
how would you solve this
anonymous
  • anonymous
help me please

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anonymous
  • anonymous
i got -1.6 as my answer am i right
anonymous
  • anonymous
Tell me how you got 1.6
anonymous
  • anonymous
-1.6*
anonymous
  • anonymous
8/-5 = 1.6
anonymous
  • anonymous
Do you only need the y value?
anonymous
  • anonymous
i need the x value
anonymous
  • anonymous
So you are isolating x, correct?
anonymous
  • anonymous
yes
anonymous
  • anonymous
You just divide the rest of the equation by -5, and x is then isolated. x = -1/5y - 8/5
anonymous
  • anonymous
Unless your teacher wants you to, you don't have to solve the fractions either.
anonymous
  • anonymous
-1/5y = -0.2 -1.6
anonymous
  • anonymous
Where did you get the -0.2 and -1.6?
anonymous
  • anonymous
I know how you got -1.6
anonymous
  • anonymous
-1 divded by 5 = -0.2
anonymous
  • anonymous
You have to keep your variables in the equation, so you would have... x = -0.2y - 1.6
anonymous
  • anonymous
Unless you are given another equation or a set of coordinates, you can't do much more to the equation given, so x = -1/5y - 8/5 or x = -0.2y - 1.6 would be your final answer.
anonymous
  • anonymous
thank you so much
anonymous
  • anonymous
You're very welcome. :)

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