Whakaoti mō x
x=7
Graph
Tohaina
Kua tāruatia ki te papatopenga
2\left(x-4\right)=x-1
Tē taea kia ōrite te tāupe x ki 4 nā te kore tautuhi i te whakawehenga mā te kore. Whakareatia ngā taha e rua o te whārite ki te x-4.
2x-8=x-1
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te x-4.
2x-8-x=-1
Tangohia te x mai i ngā taha e rua.
x-8=-1
Pahekotia te 2x me -x, ka x.
x=-1+8
Me tāpiri te 8 ki ngā taha e rua.
x=7
Tāpirihia te -1 ki te 8, ka 7.
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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Whakaurunga
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Ngā Tepe
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}