math

easy because  you could take the first one and divide with 2 and it would look like x+4y=3 and also you could take the second one and divide with -5 respectively and it would look like x+5y=3 and then you solve a system  {nl} x+4y=3=x=3-4y {nl} x+5y=3  {nl} and then where ever there is an x at the 2nd equation you replace with 3-4y then solve a 1st grade equation and find y after that replace y on the top equation

2x+8y=6    divide through by 2  →  x + 4y  = 3  

-5x+-20y=-15     divide through by -5 →  x +4y = 3  

These equations are exactly the same.....so we will have infinite solution pairs for (x , y)......!!!