Question

Rezilvati siatemul 2x+y=19
x-2y=-3

Ajutor va rog

Answer 1

2x+y=19
2x=19-y
x-2y=-3(inmultim cu 2)
2x-4y=-6
19-5y=-6
5y=19-(-6)
5y=25
y=25:5
y=5
2x=19-5
2x=14
x=14:2
x=7
{x,y}={7,5}