Question

с)
бx – 5у = -1
4х – Зу = 1​

Answer 1

бx – 5у = -1 (×3)

4х – Зу = 1 (×5)

________

18x-15y = -3 -

20x-15y = 5

________

-2x = -8

8=2x

4=x

4=xy=5