Whakaoti mō x
x=z-3y
Whakaoti mō y
y=\frac{z-x}{3}
Tohaina
Kua tāruatia ki te papatopenga
x+3y=z
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
x=z-3y
Tangohia te 3y mai i ngā taha e rua.
x+3y=z
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
3y=z-x
Tangohia te x mai i ngā taha e rua.
\frac{3y}{3}=\frac{z-x}{3}
Whakawehea ngā taha e rua ki te 3.
y=\frac{z-x}{3}
Mā te whakawehe ki te 3 ka wetekia te whakareanga ki te 3.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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Poukapa
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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Whakarerekētanga
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\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}