Whakaoti mō x
x=20
Graph
Tohaina
Kua tāruatia ki te papatopenga
150x+1800=240x
Whakareatia te 12 ki te 150, ka 1800.
150x+1800-240x=0
Tangohia te 240x mai i ngā taha e rua.
-90x+1800=0
Pahekotia te 150x me -240x, ka -90x.
-90x=-1800
Tangohia te 1800 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
x=\frac{-1800}{-90}
Whakawehea ngā taha e rua ki te -90.
x=20
Whakawehea te -1800 ki te -90, kia riro ko 20.
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