Whakaoti mō b
b=28
Tohaina
Kua tāruatia ki te papatopenga
\frac{3}{4}b-3b=-63
Tangohia te 3b mai i ngā taha e rua.
-\frac{9}{4}b=-63
Pahekotia te \frac{3}{4}b me -3b, ka -\frac{9}{4}b.
b=-63\left(-\frac{4}{9}\right)
Me whakarea ngā taha e rua ki te -\frac{4}{9}, te tau utu o -\frac{9}{4}.
b=\frac{-63\left(-4\right)}{9}
Tuhia te -63\left(-\frac{4}{9}\right) hei hautanga kotahi.
b=\frac{252}{9}
Whakareatia te -63 ki te -4, ka 252.
b=28
Whakawehea te 252 ki te 9, kia riro ko 28.
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