Whakaoti mō x
x = \frac{4}{3} = 1\frac{1}{3} \approx 1.333333333
Graph
Tohaina
Kua tāruatia ki te papatopenga
x\times 7=\left(-2x+5\right)\times 4
Tē taea kia ōrite te tāupe x ki tētahi o ngā uara 0,\frac{5}{2} nā te kore tautuhi i te whakawehenga mā te kore. Me whakarea ngā taha e rua o te whārite ki te x\left(2x-5\right), arā, te tauraro pātahi he tino iti rawa te kitea o 2x-5,0-x.
x\times 7=-8x+20
Whakamahia te āhuatanga tohatoha hei whakarea te -2x+5 ki te 4.
x\times 7+8x=20
Me tāpiri te 8x ki ngā taha e rua.
15x=20
Pahekotia te x\times 7 me 8x, ka 15x.
x=\frac{20}{15}
Whakawehea ngā taha e rua ki te 15.
x=\frac{4}{3}
Whakahekea te hautanga \frac{20}{15} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 5.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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