- #1
smart_worker
- 131
- 1
Homework Statement
find (x,y,z)
Homework Equations
3x - 4y + 7z = 0,-------------->first equation
2x - y - 2z = 0,---------------->second equation
3x3 - y3 + z3 = 18.---->third equation
The Attempt at a Solution
on subtracting first two equations i get x - 3y + 9z = 0
using this if i solve the both first two equations i get 5y - 20z = 0.
if i add the first 2 equations i get x - y -z =0
with this equation if i solve the first equation i get y = 10z
but if i solve 2nd one i get y=0.