**balloon math puzzle brain teaser**

can you solve this puzzle?

x + 2y + 3z = 0

x - y + z = 0

x + y - 2z = 0

x + y + z = ?

created by zbynny

can you solve this puzzle?

x + 2y + 3z = 0

x - y + z = 0

x + y - 2z = 0

x + y + z = ?

created by zbynny