Using substitution 3x-5y=11 and x-3y=1

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19-03-2015
Mathematics

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Using substitution 3x-5y=11 and x-3y=1

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Panoyin Panoyin · Answer 1 · 2015-03-19T01:39:13+01:00

3x - 5y = 11 ⇒ 3x - 5y = 11
1x - 3y = 1   ⇒ 3x - 9y = 3
      4y = 8
   4    4
      y = 2
   3x - 5(2) = 11
   3x - 10 = 11
      +10 +10
      3x = 21
   3 3
      x = 7
      (x, y) = (7, 2)