I'm struggling with simultaneous equations. i have till tomorrow to do it

I hope this helps you

1)

y=6

x^2+6^2=25

x^2=25-36

x^2= -9

x^2=i^2.9

x=3i there's no real solution

2)

x^2+(2x-2)^2=25

x^2+4x^2-8x+4=25

5x^2-8x=21

5x^2-8x-21=0

5x +7

x -3

(5x+7)(x-3)=0

x= -7/5

x=3