Whakaoti mō y
y = \frac{72}{7} = 10\frac{2}{7} \approx 10.285714286
Graph
Tohaina
Kua tāruatia ki te papatopenga
\frac{1}{2}y-4-\frac{1}{9}y=0
Tangohia te \frac{1}{9}y mai i ngā taha e rua.
\frac{7}{18}y-4=0
Pahekotia te \frac{1}{2}y me -\frac{1}{9}y, ka \frac{7}{18}y.
\frac{7}{18}y=4
Me tāpiri te 4 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.
y=4\times \frac{18}{7}
Me whakarea ngā taha e rua ki te \frac{18}{7}, te tau utu o \frac{7}{18}.
y=\frac{4\times 18}{7}
Tuhia te 4\times \frac{18}{7} hei hautanga kotahi.
y=\frac{72}{7}
Whakareatia te 4 ki te 18, ka 72.
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