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elspeth elspeth
  • 16-01-2017
  • Mathematics
Answered

3 + 2x-y=0 -3-7y=10x

Verified Answer :

HomertheGenius
HomertheGenius HomertheGenius
  • 23-01-2017

The system of equations:
3 + 2 x - y = 0
- 3 - 7 y = 10 x
-----------------------------------
From the 1st equation:  y = 2 x + 3
- 3 - 7 ( 2 x + 3 ) = 10 x
- 3 - 14 x - 21 = 10 x
- 14 x - 10 x = 21 + 3
- 24 x = 24
x = - 1
y = 2 ( - 1 ) + 3 
y = - 2 + 3
y = 1
Answer:  ( x , y ) = ( - 1 , 1 )

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