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apdaigle apdaigle
  • 22-07-2016
  • Mathematics
Answered

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)

Verified Answer :

nobillionaireNobley
nobillionaireNobley nobillionaireNobley
  • 22-07-2016

a - 3b = 4 . . . . (1)
a = b - 2 . . . . . (2)
Putting (2) into (1), we have
b - 2 - 3b = 4
-2b = 4 + 2 = 6
b = 6/-2 = -3
From (1), a = b - 2 = -3 - 2 = -5
Hence, solution = (-5, -3)

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