Question

solve this system of equations and solve for triple pair:
x+y+z=8
2y+4y+2z=26
-x+8y-3z=26

Answer 1

I think your second equation is probably
2x+4y+2z=26

add the first and third ---> 9y - 2z = 34 (#1)

multiply third by 2
-2x + 16y - 6z = 52
add that to the second
20y -4z = 78
10y - 2z = 39 (#2)

#2 - #1 : ----> y = 5
sub into #1
45 - 2z = 34
-2z = -11
z = 5.5

back into the first
x + 5 + 5.5 = 8
x = -2.5

x = -2.5
y= 5
z = 5.5