Whakaoti mō x
x=2
Graph
Tohaina
Kua tāruatia ki te papatopenga
2x+4=5\left(x+1\right)-7
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te x+2.
2x+4=5x+5-7
Whakamahia te āhuatanga tohatoha hei whakarea te 5 ki te x+1.
2x+4=5x-2
Tangohia te 7 i te 5, ka -2.
2x+4-5x=-2
Tangohia te 5x mai i ngā taha e rua.
-3x+4=-2
Pahekotia te 2x me -5x, ka -3x.
-3x=-2-4
Tangohia te 4 mai i ngā taha e rua.
-3x=-6
Tangohia te 4 i te -2, ka -6.
x=\frac{-6}{-3}
Whakawehea ngā taha e rua ki te -3.
x=2
Whakawehea te -6 ki te -3, kia riro ko 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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Whakarerekētanga
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