Whakaoti mō x
x=-7
Graph
Tohaina
Kua tāruatia ki te papatopenga
-40=100+20x
Tangohia te 1 i te 21, ka 20.
100+20x=-40
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
20x=-40-100
Tangohia te 100 mai i ngā taha e rua.
20x=-140
Tangohia te 100 i te -40, ka -140.
x=\frac{-140}{20}
Whakawehea ngā taha e rua ki te 20.
x=-7
Whakawehea te -140 ki te 20, kia riro ko -7.
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