Whakaoti mō r
r=-\frac{x}{2}+\frac{9}{4}
Whakaoti mō x
x=\frac{9}{2}-2r
Tohaina
Kua tāruatia ki te papatopenga
4r=9-2x
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
\frac{4r}{4}=\frac{9-2x}{4}
Whakawehea ngā taha e rua ki te 4.
r=\frac{9-2x}{4}
Mā te whakawehe ki te 4 ka wetekia te whakareanga ki te 4.
r=-\frac{x}{2}+\frac{9}{4}
Whakawehe 9-2x ki te 4.
-2x=4r-9
Tangohia te 9 mai i ngā taha e rua.
\frac{-2x}{-2}=\frac{4r-9}{-2}
Whakawehea ngā taha e rua ki te -2.
x=\frac{4r-9}{-2}
Mā te whakawehe ki te -2 ka wetekia te whakareanga ki te -2.
x=\frac{9}{2}-2r
Whakawehe 4r-9 ki te -2.
Ngā Tauira
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