alfonso7guzman7 alfonso7guzman7
  • 03-10-2020
  • Mathematics
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Subtitute 2x+y=7 and 3x-y=8

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taaaaan taaaaan
  • 03-10-2020
2x + y =7 (1)
3x-y=8 (2)

(1) + (2)

5x = 15
x = 3

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