Question

Rezolvati sistemul
$\left \{ {{x+y=10} \atop {x-y=2}} \right.$

Answer 1

Explicație pas cu pas:

x+y=10

x-y=2

_________+

2x / =12

x=12:2

x=6

6+y=10

y=10-6

y=4

S:{(6;4)}