Whakaoti mō x
x=\frac{21}{41}\approx 0.512195122
Graph
Tohaina
Kua tāruatia ki te papatopenga
42+x\times 7=89x
Tē taea kia ōrite te tāupe x ki 0 nā te kore tautuhi i te whakawehenga mā te kore. Whakareatia ngā taha e rua o te whārite ki te x.
42+x\times 7-89x=0
Tangohia te 89x mai i ngā taha e rua.
42-82x=0
Pahekotia te x\times 7 me -89x, ka -82x.
-82x=-42
Tangohia te 42 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
x=\frac{-42}{-82}
Whakawehea ngā taha e rua ki te -82.
x=\frac{21}{41}
Whakahekea te hautanga \frac{-42}{-82} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te -2.
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