Jasmine2091 Jasmine2091

02-06-2015
Mathematics

contestada

what is the solution to this system of linear equations:
y-x=4 and y+2x=1

Respuesta :

Panoyin Panoyin

04-06-2015

-x + y = 4
2x + y = 1
    -3x = 3
   -3    -3
   x = -1
   -x + y = 4
-(-1) + y = 4
   1 + y = 4
- 1   - 1
   y = 3
(x, y) = (-1, 3)

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