rajer123
rajer123 rajer123
  • 18-01-2018
  • Mathematics
contestada

Solve using elimination

Solve using elimination class=

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chrysanthemum
chrysanthemum chrysanthemum
  • 18-01-2018
 - 3x - y = 8
  7x + y = -12
+__________
     4x    = -4
          x = -1

-3(-1) - y = 8
       3 - y = 8
          - y = 5
            y = -5

 - 3(-1) - (-5) = 8         -->     3 + 5 = 8     <-- Correct
  7(-1) + (-5) = -12      -->      -7 -5 = -12  <-- Correct

Answer:
x = -1
y = -5

Hope this helps.
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