Question

Consider the following pair of equations:

Answer 1

$3x + 3 = x - 1 \\ 3x - x = - 1 - 3 \\ 2x = - 4 \\ x = \frac{ - 4}{2 } = - 2$
Take X=-2 into y
$y = x - 1 \\ y = - 2 - 1 \\ y = - 3$
(x, y) =(-2,-3)