Question

3x+4y=0 x-5y=19
Ans -4 and 3

Answer 1

3x+4y = 0 multiply by 5

x-5y=19 multiply by 4

15x+20y =0

4x-20y =76

19x=76

x=4

15×4+20y=0

60+20y=0

20y=--60

y=--3

If you have doubt you can check it

4--5×-3=19

4+15=19