\left\{ \begin{array} { l } { y = - 1 } \\ { - 3 x + 2 y = 21 } \end{array} \right.
Whakaoti mō y, x
x = -\frac{23}{3} = -7\frac{2}{3} \approx -7.666666667
y=-1
Graph
Tohaina
Kua tāruatia ki te papatopenga
-3x+2\left(-1\right)=21
Whakaarohia te whārite tuarua. Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.
-3x-2=21
Whakareatia te 2 ki te -1, ka -2.
-3x=21+2
Me tāpiri te 2 ki ngā taha e rua.
-3x=23
Tāpirihia te 21 ki te 2, ka 23.
x=-\frac{23}{3}
Whakawehea ngā taha e rua ki te -3.
y=-1 x=-\frac{23}{3}
Kua oti te pūnaha te whakatau.
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