anonymous
  • anonymous
Two equations are given below: a − 3b = 4 a = b − 2 What is the solution to the set of equations in the form (a, b)? (−2, −2) (−3, −1) (−9, −7) (−5, −3)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@Sachintha
anonymous
  • anonymous
@pooja195
anonymous
  • anonymous
@happyrosy

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anonymous
  • anonymous
do you know substitution method?
anonymous
  • anonymous
no
anonymous
  • anonymous
you already have a= b-2 Substitute that for a
anonymous
  • anonymous
a -3b = 4 --> b - 2 -3b = 4
anonymous
  • anonymous
-2b - 2 = 4 -2b = 6 b = -3
anonymous
  • anonymous
okay so is it B
anonymous
  • anonymous
Substitute b in any of your 2 original equations
anonymous
  • anonymous
No it isn't b. Remember it is in the form of (a, b)---> (a, -3)
anonymous
  • anonymous
Answer is D i believe
anonymous
  • anonymous
THANKS! @claringleek
anonymous
  • anonymous
:)
anonymous
  • anonymous
a − 3b = 4 a = b − 2 We are going to have to substitute -3 for b. Let's choose the second equation because it is shorter. a = -3 - 2, which means a = -5 So, ( -5, -3) is your answer which is D

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