anonymous
  • anonymous
Solve using substitution 2x=y+9 5y=10x-45
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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lgbasallote
  • lgbasallote
if 2x = y + 9 then let y = 2x - 9 make sense?
anonymous
  • anonymous
no really :/
anonymous
  • anonymous
find one variable, either x or y, first

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anonymous
  • anonymous
i think ill choose x
anonymous
  • anonymous
so if you get x alone for one equation, you then replace what you get into the second equation and solve for y
anonymous
  • anonymous
so i mutiply 10x on all 3 of the first equation?
anonymous
  • anonymous
o.O? to get x alone? or?
anonymous
  • anonymous
to subtract it with the other equation?
anonymous
  • anonymous
are you trying to solve it by elimination?
anonymous
  • anonymous
no by substitution
anonymous
  • anonymous
if you get Y alone in the first equation it would be what the first person said y=2x-9 then you substitute the 2x-9 into the second equation getting 5(2x-9)=10x+45
anonymous
  • anonymous
10x-45=10x-45*
anonymous
  • anonymous
oh i kinda get it. then you multipy 5 on the parantesis
anonymous
  • anonymous
than you add like terms?
anonymous
  • anonymous
both sides equal each other if you combine like terms you get 0=0
anonymous
  • anonymous
:o o? wow. now i have to solve the other 1
anonymous
  • anonymous
good luck! hope it helped.
anonymous
  • anonymous
its sure did friend=)

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