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

Sagot :

Panoyinidn
 -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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