Răspunsuri

2014-09-10T16:59:11+03:00


3(a+6b-4c)

sper ca a fost de ajutor

\left \{ {{5x-4y=2} \atop {x-y=2}} \right. * -5
\left \{ {{5x-4y=2} \atop {-5x+5y=-10}} \right.
Le adunam
y=-8
x+8=2
x=2-8
x=-6