Solve the following? " "x + y = 1 " "x + 3y = 9

Mar 6, 2018

x is -3 and y is 4

Explanation:

Subtracting the equations we get,

$x + y = 1$
$-$$-$ $-$
$x + 3 y = 9$

$= - 2 y = - 8$
$= y = 4$

$x = 1 - 4 = - 3$