Question

решить методом подстановки 3х+2у=6 2х-у=1

Answer 1

$3x+2y=6$
$2x-y=1$

$3x+2(2x-1)=6$
$y=2x-1$

$7x=8$
$y=2x-1$

$x=1frac{1}{7}$
$y=2*frac{8}{7}-1$

$x=1frac{1}{7}$
$y=frac{16}{7}-1$

$x=1frac{1}{7}$
$y=2frac{2}{7}-1$

$x=1frac{1}{7}$
$1frac{2}{7}$