3 years ago

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

1 answer:

5 0

-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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