Question

{2x+3y}=12

{6x+4y}=15

Answer 1

$\left \{ {{2x+3y=12~~\bullet(-1)} \atop {6x+4y=15~~~~~~~~}} \right.$


$\left \{ {{-6x-9y=-36} \atop {6x+4y=15}} \right.$

$-5y=-21\\5y=21$

$\boxed{y= \frac{21}{5}}$

$2x+3( \frac{21}{5} )=12$

$2x+ \frac{63}{5} =12$

$2x=12- \frac{63}{5}$

$2x= \frac{-3}{5}$

$10x=-3$

$\boxed{x= \frac{-3}{10}}$