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20+x\times 2=12
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
x\times 2=12-20
Tangohia te 20 mai i ngā taha e rua.
x\times 2=-8
Tangohia te 20 i te 12, ka -8.
x=\frac{-8}{2}
Whakawehea ngā taha e rua ki te 2.
x=-4
Whakawehea te -8 ki te 2, kia riro ko -4.