Whakaoti mō x
x = \frac{80}{3} = 26\frac{2}{3} \approx 26.666666667
Graph
Tohaina
Kua tāruatia ki te papatopenga
180-5x-x-20=0
Pahekotia te -3x me -2x, ka -5x.
180-6x-20=0
Pahekotia te -5x me -x, ka -6x.
160-6x=0
Tangohia te 20 i te 180, ka 160.
-6x=-160
Tangohia te 160 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
x=\frac{-160}{-6}
Whakawehea ngā taha e rua ki te -6.
x=\frac{80}{3}
Whakahekea te hautanga \frac{-160}{-6} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te -2.
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