Whakaoti mō x
x=\frac{5-2y}{7}
Whakaoti mō y
y=\frac{5-7x}{2}
Graph
Tohaina
Kua tāruatia ki te papatopenga
7x=5-2y
Tangohia te 2y mai i ngā taha e rua.
\frac{7x}{7}=\frac{5-2y}{7}
Whakawehea ngā taha e rua ki te 7.
x=\frac{5-2y}{7}
Mā te whakawehe ki te 7 ka wetekia te whakareanga ki te 7.
2y=5-7x
Tangohia te 7x mai i ngā taha e rua.
\frac{2y}{2}=\frac{5-7x}{2}
Whakawehea ngā taha e rua ki te 2.
y=\frac{5-7x}{2}
Mā te whakawehe ki te 2 ka wetekia te whakareanga ki te 2.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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\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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Ngā Tepe
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}