\left\{ \begin{array}{l}{ z = - 2 }\\{ - 3 y + 4 z = 4 }\end{array} \right.
Whakaoti mō z, y
y=-4
z=-2
Tohaina
Kua tāruatia ki te papatopenga
-3y+4\left(-2\right)=4
Whakaarohia te whārite tuarua. Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.
-3y-8=4
Whakareatia te 4 ki te -2, ka -8.
-3y=4+8
Me tāpiri te 8 ki ngā taha e rua.
-3y=12
Tāpirihia te 4 ki te 8, ka 12.
y=\frac{12}{-3}
Whakawehea ngā taha e rua ki te -3.
y=-4
Whakawehea te 12 ki te -3, kia riro ko -4.
z=-2 y=-4
Kua oti te pūnaha te whakatau.
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