Question

Solve : 15a + 17b = 21 ; 17a + 15b = 11​

Answer 1

Answer:

15a+17b=21_____(¡)×17

17a+15b=11______(¡¡)×15

255a+289b=357

255a+225b=165

-. -. -. ( sing changed )

______________

64b=192

b=192/64

b=3

( value of b is put in equation one)

15a+ 17b=21

15a+17×3=21

15a=21-51

a=-30/15

a=-3

a=-3 and b =3

I think it will be help you