Question

find the equation: x+y = 5and 2x -- 3y = 4

Answer 1

$multipling \: equtation \: 2 \: by \: 3$

$(3x + 3y) - (2x - 3y) = 15 - 4$
$3x + 3y - 3y - 2x = 11$
$3x - 2x = 11$
$x = 1$
$putting \: the \: value \: of \: x \: in \: equation1$
$11 + y = 5$
$y = 5 - 11 = - 6$