pleae help solve: 3x-5y=7 and 5x-2y=-1

Answer 1

3x-5y=7 times 5 15x-25y=35
5x-2y=-1times 3 15x -6y=-3
subtract second from first
0x -19y = 38
y = -2
3x-5(-2) = 7
3x +10 =7
3x = -3
x = -1

check
3(-1) -5(-2) = 7 yes
5(-1)-2(-2)=-1 yes

Answer 2

25y to the second power times x to the second power plus 20xy to the second power plus 4x to the second power