Whakaoti mō a
\left\{\begin{matrix}\\a=\frac{9}{10}=0.9\text{, }&\text{unconditionally}\\a\in \mathrm{R}\text{, }&b=0\end{matrix}\right.
Whakaoti mō b
\left\{\begin{matrix}\\b=0\text{, }&\text{unconditionally}\\b\in \mathrm{R}\text{, }&a=\frac{9}{10}\end{matrix}\right.
Tohaina
Kua tāruatia ki te papatopenga
80ba=72b
He hanga arowhānui tō te whārite.
\frac{80ba}{80b}=\frac{72b}{80b}
Whakawehea ngā taha e rua ki te 80b.
a=\frac{72b}{80b}
Mā te whakawehe ki te 80b ka wetekia te whakareanga ki te 80b.
a=\frac{9}{10}
Whakawehe 72b ki te 80b.
80ab-72b=0
Tangohia te 72b mai i ngā taha e rua.
\left(80a-72\right)b=0
Pahekotia ngā kīanga tau katoa e whai ana i te b.
b=0
Whakawehe 0 ki te 80a-72.
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