If the two solutions of the bivariate linear equation K × - y = - B are × = 2, y = 0 × = 1, y = - 1, find the expression of the corresponding linear function

If the two solutions of the bivariate linear equation K × - y = - B are × = 2, y = 0 × = 1, y = - 1, find the expression of the corresponding linear function

k×-y=-b
Then 2k-0 = - B
k-1=-b
The solution is k = - 1, B = 2
So the expression is
-x-y=-2
x+y=2