Whakaoti mō x
x=19
Graph
Tohaina
Kua tāruatia ki te papatopenga
7x-20-5x=18
Tangohia te 5x mai i ngā taha e rua.
2x-20=18
Pahekotia te 7x me -5x, ka 2x.
2x=18+20
Me tāpiri te 20 ki ngā taha e rua.
2x=38
Tāpirihia te 18 ki te 20, ka 38.
x=\frac{38}{2}
Whakawehea ngā taha e rua ki te 2.
x=19
Whakawehea te 38 ki te 2, kia riro ko 19.
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]
whārite Simultaneous
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Whakarerekētanga
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Whakaurunga
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Ngā Tepe
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