Question

qua e o resutado desa equasao 2x+y=1 x+3y=8

Answer 1

{2x+y=1} *(-1)

{x+3y=8} *(2)

-2x-y=-1

2x+6y=16

5y=16

y=16/5

y=3,2

2x+y=1

2x+3,2=1

2x=1-3,2

2x=-2,2

x=-2,2/2

x=-1,1