Question

resolva x-2y=5 2x+3y=17

Answer 1

Resposta:

{2×+3y=17.(2)

{3×-2y=6.(3)

4×+6y=34

9×-6y=18

13×=52

×=52/13

×=4

2×+3y=17

2.(4)+3y=17

8+3y=17

3y=17-8

3y=9

y=3

S={(4;3)}

tomara que eu tenha te ajudado