Whakaoti mō b
b=9
Tohaina
Kua tāruatia ki te papatopenga
\frac{2}{3}b+5+b=20
Me tāpiri te b ki ngā taha e rua.
\frac{5}{3}b+5=20
Pahekotia te \frac{2}{3}b me b, ka \frac{5}{3}b.
\frac{5}{3}b=20-5
Tangohia te 5 mai i ngā taha e rua.
\frac{5}{3}b=15
Tangohia te 5 i te 20, ka 15.
b=15\times \frac{3}{5}
Me whakarea ngā taha e rua ki te \frac{3}{5}, te tau utu o \frac{5}{3}.
b=\frac{15\times 3}{5}
Tuhia te 15\times \frac{3}{5} hei hautanga kotahi.
b=\frac{45}{5}
Whakareatia te 15 ki te 3, ka 45.
b=9
Whakawehea te 45 ki te 5, kia riro ko 9.
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