Question

Solve : $2x+5y+72=30$
$3x-6y+52=15$

Answer 1

$2x+5y=-\mathrm{42...}\left(1\right)$

$3x-6y=-\mathrm{37...}\left(2\right)$

$\left(1\right)\times 3-\left(2\right)\times 2$

$6x+15y=-126$...(3)

$6x-12y=-74$...(4)

Sloving (3) and (4), we get

$y=\frac{-52}{27}$

Substituting the value of y in eqn (1), we get

$x=\frac{-437}{27}$