Question

{25x-4y+1=0, {31x-5y+16=0;

Answer 1

{25x-4y+1=0

{31x-5y+16=0

 

{x-0.16y+0.04=0

{31x-5y+16=0

 

{x=0.16y-0.04

{31x+5y+16=0

 

31*(0.16y-0.04)+5y+16=0

4.96y-1.24+5y+16=0

4.96y+5y=1.24-16

9.96y=-14.76

y=-1.4819277