\left\{ \begin{array} { l } { 5 x + y = 7 } \\ { 4 x + 5 = - 11 } \end{array} \right.
Whakaoti mō x, y
x=-4
y=27
Graph
Tohaina
Kua tāruatia ki te papatopenga
4x=-11-5
Whakaarohia te whārite tuarua. Tangohia te 5 mai i ngā taha e rua.
4x=-16
Tangohia te 5 i te -11, ka -16.
x=\frac{-16}{4}
Whakawehea ngā taha e rua ki te 4.
x=-4
Whakawehea te -16 ki te 4, kia riro ko -4.
5\left(-4\right)+y=7
Whakaarohia te whārite tuatahi. Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.
-20+y=7
Whakareatia te 5 ki te -4, ka -20.
y=7+20
Me tāpiri te 20 ki ngā taha e rua.
y=27
Tāpirihia te 7 ki te 20, ka 27.
x=-4 y=27
Kua oti te pūnaha te whakatau.
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