Whakaoti mō x
x=16
Graph
Tohaina
Kua tāruatia ki te papatopenga
9x+15+21=180
Pahekotia te 6x me 3x, ka 9x.
9x+36=180
Tāpirihia te 15 ki te 21, ka 36.
9x=180-36
Tangohia te 36 mai i ngā taha e rua.
9x=144
Tangohia te 36 i te 180, ka 144.
x=\frac{144}{9}
Whakawehea ngā taha e rua ki te 9.
x=16
Whakawehea te 144 ki te 9, kia riro ko 16.
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