Question

The ordered pair (1, -5) is a solution for the system x + 2y = -9 and x - y = 6 True False

Answer 1

$1+2\cdot(-5)=-9\\ 1-10=-9\\ -9=-9\Rightarrow \hbox{ true}\\\\ 1-(-5)=6\\ 1+5=6\\ 6=6 \Rightarrow \hbox{ true}$

TRUE

Answer 2

TRUE
(1) + (-10) = -9
(1) - (-5) = 6