Whakaoti mō x
x=-\frac{20}{799}\approx -0.025031289
Graph
Tohaina
Kua tāruatia ki te papatopenga
x-2x\times 400=20
Me whakarea ngā taha e rua o te whārite ki te 20, arā, te tauraro pātahi he tino iti rawa te kitea o 20,10.
x-800x=20
Whakareatia te 2 ki te 400, ka 800.
-799x=20
Pahekotia te x me -800x, ka -799x.
x=\frac{20}{-799}
Whakawehea ngā taha e rua ki te -799.
x=-\frac{20}{799}
Ka taea te hautanga \frac{20}{-799} te tuhi anō ko -\frac{20}{799} mā te tango i te tohu tōraro.
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