Whakaoti mō a
a=-\frac{7}{15}\approx -0.466666667
Tohaina
Kua tāruatia ki te papatopenga
105a+189=45\times 5a+245
Me whakarea ngā taha e rua o te whārite ki te 315, arā, te tauraro pātahi he tino iti rawa te kitea o 3,5,7,9.
105a+189=225a+245
Whakareatia te 45 ki te 5, ka 225.
105a+189-225a=245
Tangohia te 225a mai i ngā taha e rua.
-120a+189=245
Pahekotia te 105a me -225a, ka -120a.
-120a=245-189
Tangohia te 189 mai i ngā taha e rua.
-120a=56
Tangohia te 189 i te 245, ka 56.
a=\frac{56}{-120}
Whakawehea ngā taha e rua ki te -120.
a=-\frac{7}{15}
Whakahekea te hautanga \frac{56}{-120} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 8.
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