Question

-x + y - 2z = 0 2x - y +3z = 2 5x - 3y + 7z = 5 reduccion me ayudan...

Answer 1

-x+y-2 z = 0
2 x-y+3 z = 2
5 x-3 y+7 z = 5

{-x+y-2 z = 0
2 x-y+3 z = 2
5 x-3 y+7 z = 5

{y = x+2 z
2 x-y+3 z = 2
5 x-3 y+7 z = 5

{y = x+2 z
x+z = 2
5 x+7 z-3 (x+2 z) = 5

5 x+7 z-3 (x+2 z) = 5 x+7 z+(-3 x-6 z) = 2 x+z:

y = x+2 z
x+z = 2
2 x+z = 5
I
{y = x+2 z
x+z = 2
2 x+z = 5

{y = x+2 z
z = 2-x
2 x+z = 5

y = x+2 z
z = 2-x
x+2 = 5

y = x+2 z
z = 2-x
x+2 = 5

y = x+2 z
z = 2-x
x = 3

y = 2 z+3
z = -1
x = 3

y = 1
z = -1
x = 3

x = 3
y = 1
z = -1