Question

Resolva pelo medo da substiçao

b)5x+4y=1
2x-3y=5

Answer 1

(5x+4y=1) × 3

(2x-3y=5) × 4

15x+12y = 3

8x-12y = 20

12y=3-15x

8x - 3 + 15x= 20

8x+15x=23

23x=23
x=1