Whakaoti mō d
d = \frac{29}{7} = 4\frac{1}{7} \approx 4.142857143
Tohaina
Kua tāruatia ki te papatopenga
15d+875-225d=5
Tangohia te 225d mai i ngā taha e rua.
-210d+875=5
Pahekotia te 15d me -225d, ka -210d.
-210d=5-875
Tangohia te 875 mai i ngā taha e rua.
-210d=-870
Tangohia te 875 i te 5, ka -870.
d=\frac{-870}{-210}
Whakawehea ngā taha e rua ki te -210.
d=\frac{29}{7}
Whakahekea te hautanga \frac{-870}{-210} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te -30.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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