Whakaoti mō a
a=-4
Tohaina
Kua tāruatia ki te papatopenga
4a+5-3.25a=2
Tangohia te 3.25a mai i ngā taha e rua.
0.75a+5=2
Pahekotia te 4a me -3.25a, ka 0.75a.
0.75a=2-5
Tangohia te 5 mai i ngā taha e rua.
0.75a=-3
Tangohia te 5 i te 2, ka -3.
a=\frac{-3}{0.75}
Whakawehea ngā taha e rua ki te 0.75.
a=\frac{-300}{75}
Whakarohaina te \frac{-3}{0.75} mā te whakarea i te taurunga me te tauraro ki te 100.
a=-4
Whakawehea te -300 ki te 75, kia riro ko -4.
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