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06-04-2015
Mathematics

Answered

linear equation

4.5 + 1.5y=24
x-y=4

Answer :

Panoyin Panoyin

06-04-2015

4.5x + 1.5y = 24 ⇒ 4.5x + 1.5y = 24
1.0x - 1.0y = 4   ⇒ 4.5x - 4.5y = 18
         6y = 6
      6    6
       y = 1
   4.5x + 1.5(1) = 24
   4.5x + 1.5 = 24
      - 1.5 - 1.5
      4.5x = 22.5
   4.5 4.5
       x = 5
      (x, y) = (5, 1)

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