Question Practice

Qn #1534
Suppose, the system of linear equations 
-2x + y + z = l 
x - 2y + z = m 
x + y - 2z = n 
is such that l + m + n = 0, then the system has:
    ❓ Question: Suppose, the system of linear equations -2x + y + ... | TANCET Group Studies | Tancet Group Studies