Whakaoti mō x
x=2
Graph
Tohaina
Kua tāruatia ki te papatopenga
9x+42=100-9x-22
Pahekotia te 11x me -2x, ka 9x.
9x+42=78-9x
Tangohia te 22 i te 100, ka 78.
9x+42+9x=78
Me tāpiri te 9x ki ngā taha e rua.
18x+42=78
Pahekotia te 9x me 9x, ka 18x.
18x=78-42
Tangohia te 42 mai i ngā taha e rua.
18x=36
Tangohia te 42 i te 78, ka 36.
x=\frac{36}{18}
Whakawehea ngā taha e rua ki te 18.
x=2
Whakawehea te 36 ki te 18, kia riro ko 2.
Ngā Tauira
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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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Whakarerekētanga
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Ngā Tepe
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}