Question

-7,2 x + 11y = -19,
5,8x - 13 y = 36.
Помогите плииз 10 баллов даю​

Answer 1

−7.2x+11y=−19,5.8x−13y=36

−7.2x+11y=−19

−7.2x=−11y−19

х= -5/36 (−11y−19)

х=55/36у+95/36

5,8(55/36у+95/36)-13у=36

319/36у+551/36-13у=36

- 149/36у+551/36=36

- 149/36у=745/36

y=−5

х=55/36 (−5)+ 95/36

x= 275+95:36

x=−5

x=−5, y=−5