Question

resouva e prepare os sistemas
3x+5y=11
2x-y=16

Answer 1

3 x + 5 y = 11
2 x - y = 16 (5) 

10 x -5 y =80
3 x + 5 y = 11
-----------------------
13 x = 91
x = 91/13
x = 7
2 x - y = 16
2 . 7  - y = 16
14 - y = 16
- y = 16 - 14
- y = 2
(-1)  y = -2
Resposta x=7 e y = -2