Whakaoti mō y
y=-70
Graph
Tohaina
Kua tāruatia ki te papatopenga
\frac{2}{5}y+28=0
Whakahekea te hautanga \frac{4}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.
\frac{2}{5}y=-28
Tangohia te 28 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
y=-28\times \frac{5}{2}
Me whakarea ngā taha e rua ki te \frac{5}{2}, te tau utu o \frac{2}{5}.
y=\frac{-28\times 5}{2}
Tuhia te -28\times \frac{5}{2} hei hautanga kotahi.
y=\frac{-140}{2}
Whakareatia te -28 ki te 5, ka -140.
y=-70
Whakawehea te -140 ki te 2, kia riro ko -70.
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