Whakaoti mō a
a = \frac{220}{7} = 31\frac{3}{7} \approx 31.428571429
Tohaina
Kua tāruatia ki te papatopenga
9a-120-2a=100
Tangohia te 2a mai i ngā taha e rua.
7a-120=100
Pahekotia te 9a me -2a, ka 7a.
7a=100+120
Me tāpiri te 120 ki ngā taha e rua.
7a=220
Tāpirihia te 100 ki te 120, ka 220.
a=\frac{220}{7}
Whakawehea ngā taha e rua ki te 7.
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