Saddex isle'eg, saddex aan la aqoon

Saddexda isle'eg waa: $\displaystyle x + y - z = 9$; $\displaystyle 6x + 6y - z = 17$; iyo $\displaystyle 14x - 7y + 2z = 42$. Riix , , . Safka koowaad: 1, , 1, , badhanka , 1, , 9, . Safka labaad: 6, , 6, , badhanka , 1, , 17, . Safka saddexaad: 14, , badhanka , 7, , 2, , iyo 42.