Question

-x + 3y = 8
b) (2x - y = -1​

Answer 1

$- x + 3y = 8 \\ 2x - y = - 1 \\ \\ - 2x + 6y = 16 \\ 2x - y = - 1 \\ \\ 5y = 15 \\ \\ y = \frac{15}{5} = 3. \\ \\ 2x - 3 = - 1 \\ 2x = - 1 + 3 \\ \\ 2x = 2 \\ x = \frac{2}{2} = 1.$

s = {1, 3}