Question

Sitemas 2x-6y=10 4x+8y=0

Answer 1

Explicação passo-a-passo:

Sitemas:

2x-6y=10.(-2)

4x+8y=0

_____________

-4x+12y=-20

4x+8y=0

____________

12y+8y=-20+0

20y=-20

y=-20/20

y=-1

2x-6y=10

2x=10+6y

2x=10+6.(-1)

2x=10-6

2x=4

x=4/2

x=2

S={2,-1}

ok!

Answer 2

2x - 6y = 10
4x + 8y = 0

2x - 6y = 10 .(-2)
4x + 8y = 0

-4x + 12y = -20
4x + 8y = 0
———————-
0x + 20y = -20
20y = -20
y = -20/20
y = -1

4x + 8.(-1) = 0
4x - 8 = 0
4x = 8
x = 8/4
x = 2

S= {2 ; -1}

Espero ter ajudado!