Whakaoti mō x
x=-\frac{1}{20}=-0.05
Graph
Tohaina
Kua tāruatia ki te papatopenga
10x\times 20-x\times 400=10
Whakareatia ngā taha e rua o te whārite ki te 10.
200x-x\times 400=10
Whakareatia te 10 ki te 20, ka 200.
-200x=10
Pahekotia te 200x me -x\times 400, ka -200x.
x=\frac{10}{-200}
Whakawehea ngā taha e rua ki te -200.
x=-\frac{1}{20}
Whakahekea te hautanga \frac{10}{-200} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 10.
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