Question

2x-y=3
5x+y2=1

x-y=5
x2+y2=13

7x2-7=0

5x2-15=0

8x2=60-7x2

4x2-49=0

3x2+30= 0

3x2+30=0

Answer 1

A)

2x-y=3 (-2x)

5x+2y=1

-4x-2y=3

5x-2y=1

1x+0y=4

1x=4

x= 4/1

x= 4

5.4+2y= 1

20+2y=1

2y= 1-20

2y= -19

y= -19/2

y= 9,5