Решите систему уравнений 1)3х+5у=16 2х+3у=9 2)9х-7у=95 4х+у=34. Решите 16 баллов...

Решите задачу:

$\boxed{1.} \displaystyle \left \{ {{3x+5y=16 \big| \cdot 2} \atop {2x+3y=9 \big| \cdot (-3)}} \right.$
$\displaystyle \left \{ {{6x+10y=32} \atop {-6x-9y=-27}} \right.$
$y=5$
$3x+25=16$
$3x=-9$
$x=-3$

$\boxed{2.} \displaystyle \left \{ {{9x-7y=95} \atop {4x+y=34 \big| \cdot 7}} \right.$
$\displaystyle \left \{ {{9x-7y=95} \atop {28x+7y=238}} \right.$
$37x=333$
$x=9$
$81-7y=95$
$-7y=14$
$y=-2$