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EvinNazya
EvinNazya EvinNazya
  • 05-01-2016
  • Mathematics
Answered

2x + y = -2

x + y = 5


The x-coordinate of the solution to the system shown is _____.

Verified Answer :

pingwin09
pingwin09 pingwin09
  • 06-01-2016

The x-coordinate of the solution to the system shown is -7.

Proof:
From the 2nd equation, equate in terms of y:
y = 5 - x
Then substitute it to the first equation:
2x + 5 - x = -2
2x - x = -2 -5
x = -7

Answer Link

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