anonymous
  • anonymous
Consider the following pair of equations: y = x + 4 y = −2x − 2 Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.
Mathematics
jamiebookeater
  • jamiebookeater
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pooja195
  • pooja195
it already tells u the value of y so plug it in opposite equations :) E1 -----> E2
pooja195
  • pooja195
\[\huge~ x + 4= −2x − 2 \] Now you have to combine like terms
pooja195
  • pooja195
x+2x=? -2-4=?

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anonymous
  • anonymous
3x and -6
pooja195
  • pooja195
good \[\huge3x=-6\] Whats -6/3
anonymous
  • anonymous
-2
pooja195
  • pooja195
Good so we have x=-2 now just plug in X value into E1 :) \[y = (-2)+ 4\]
anonymous
  • anonymous
wait im confused
anonymous
  • anonymous
how did you get that equation?
anonymous
  • anonymous
OHH
anonymous
  • anonymous
i understand now :)
pooja195
  • pooja195
good :) so whats the answer?
anonymous
  • anonymous
y=2
pooja195
  • pooja195
good so we have x=-2 y=2 :)
anonymous
  • anonymous
Thank you so much!
pooja195
  • pooja195
No problem :)

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