Whakaoti mō a
a=-1
Tohaina
Kua tāruatia ki te papatopenga
30=6\left(8+3a\right)
Me whakarea ngā taha e rua o te whārite ki te 12, arā, te tauraro pātahi he tino iti rawa te kitea o 12,2.
30=48+18a
Whakamahia te āhuatanga tohatoha hei whakarea te 6 ki te 8+3a.
48+18a=30
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
18a=30-48
Tangohia te 48 mai i ngā taha e rua.
18a=-18
Tangohia te 48 i te 30, ka -18.
a=\frac{-18}{18}
Whakawehea ngā taha e rua ki te 18.
a=-1
Whakawehea te -18 ki te 18, kia riro ko -1.
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