Question

{3.1 + y=8
{2x + 2y = 8​

Answer 1

(x,y)=(-0.9,4.9)

{3.1 + y=8

{2x + 2y = 8

{y=4.9

{2x + 2y = 8

2x + 2y = 8

2x + 2×4.9 = 8

x=-0.9