First, let's isolate x^2 in the second equation:
x^2 = 250 + 6y^2
Now substitute x^2 in the first equation:
2(250 + 6y^2) - 3xy - 19y^2 = 25500 + 12y^2 - 3xy - 19y^2 = 25500 - 7y^2 - 3xy = 25475 - 7y^2 - 3xy = 0
You can then substitute this result back into the second equation to solve for y.
First, let's isolate x^2 in the second equation:
x^2 = 250 + 6y^2
Now substitute x^2 in the first equation:
2(250 + 6y^2) - 3xy - 19y^2 = 25
500 + 12y^2 - 3xy - 19y^2 = 25
500 - 7y^2 - 3xy = 25
475 - 7y^2 - 3xy = 0
You can then substitute this result back into the second equation to solve for y.