Whakaoti mō a
a=2b+7
Whakaoti mō b
b=\frac{a-7}{2}
Tohaina
Kua tāruatia ki te papatopenga
-a+b+19+b+0=12
Pahekotia te a me -2a, ka -a.
-a+2b+19+0=12
Pahekotia te b me b, ka 2b.
-a+2b+19=12
Tāpirihia te 19 ki te 0, ka 19.
-a+19=12-2b
Tangohia te 2b mai i ngā taha e rua.
-a=12-2b-19
Tangohia te 19 mai i ngā taha e rua.
-a=-7-2b
Tangohia te 19 i te 12, ka -7.
-a=-2b-7
He hanga arowhānui tō te whārite.
\frac{-a}{-1}=\frac{-2b-7}{-1}
Whakawehea ngā taha e rua ki te -1.
a=\frac{-2b-7}{-1}
Mā te whakawehe ki te -1 ka wetekia te whakareanga ki te -1.
a=2b+7
Whakawehe -7-2b ki te -1.
-a+b+19+b+0=12
Pahekotia te a me -2a, ka -a.
-a+2b+19+0=12
Pahekotia te b me b, ka 2b.
-a+2b+19=12
Tāpirihia te 19 ki te 0, ka 19.
2b+19=12+a
Me tāpiri te a ki ngā taha e rua.
2b=12+a-19
Tangohia te 19 mai i ngā taha e rua.
2b=-7+a
Tangohia te 19 i te 12, ka -7.
2b=a-7
He hanga arowhānui tō te whārite.
\frac{2b}{2}=\frac{a-7}{2}
Whakawehea ngā taha e rua ki te 2.
b=\frac{a-7}{2}
Mā te whakawehe ki te 2 ka wetekia te whakareanga ki te 2.
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