Question

2x+6y+z=7 X+2y-z=-1 5x+7y-4z=9 ayudenme a resolver esta ecuacion 3por 3

Answer 1

2x + 6y + z = 7
x + 2y - z = -1
5x + 7y - 4z = 9


z = 7 - 2x - 6y z = 7-2(3/8)-6(13/24) z = 3

x + 2y - (7 - 2x - 6y) = -1
x + 2y - 7 + 2x + 6y = -1
3x + 9y = 6
x + 3y = 2

x = 2 - 3y x = 2 - 3(13/24) = 3/8 x = 3/8


5(2-3y) + 7y - 4(7 - 2(2-2y) - 6) = 9
10 - 15y + 7y - 4(7 - 4 + 4y - 6) = 9
10 - 8y - 28 + 16 - 16y + 24 = 9
22 - 24y = 9
13 = 24y

y = 13/24

Answer 2

Respuesta:

Esta mal echo

Explicación paso a paso:

2y+6y= 8y