Whakaoti mō r
r=-\frac{u}{2}
Whakaoti mō u
u=-2r
Tohaina
Kua tāruatia ki te papatopenga
2r+u+r=r
Pahekotia te r me r, ka 2r.
3r+u=r
Pahekotia te 2r me r, ka 3r.
3r+u-r=0
Tangohia te r mai i ngā taha e rua.
2r+u=0
Pahekotia te 3r me -r, ka 2r.
2r=-u
Tangohia te u mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
\frac{2r}{2}=-\frac{u}{2}
Whakawehea ngā taha e rua ki te 2.
r=-\frac{u}{2}
Mā te whakawehe ki te 2 ka wetekia te whakareanga ki te 2.
2r+u+r=r
Pahekotia te r me r, ka 2r.
3r+u=r
Pahekotia te 2r me r, ka 3r.
u=r-3r
Tangohia te 3r mai i ngā taha e rua.
u=-2r
Pahekotia te r me -3r, ka -2r.
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