Question

Solve x-y = -1 and x+2y = -1​

Answer 1

Answer:

$x - y = - 1 \\ = > x = - 1 + y \\ \\ now \: x + 2y = - 1 \\ = > - 1 + y + 2y = - 1 \\ = > 3y = - 1 + 1 \\ = > 3y = 0 \\ = > y = 0 \div \: 3 \\ = > y = 0 \\ \\ now \: \: x - y = - 1 \\ = > x - 0 = - 1 \\ = > x = - 1 + 0 \\ = > x = 0$

hope it helps