Question

Решите систему уравнений 2х-3у=7, 5х+2у=8

Answer 1

5х=8-2у
х=(8-2у)/5
2*(8-2у)/5-3у=7
(16-4у)/10-3у=7
16-4у-30у=70
-34у=54
у=54:(-34)
у=-27/17
х=(8-2*(-27/17))/5=(8+54/34)/5=326/34/5=1630/34=
47 целых 32/34=
47 целых 16/17