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Tohaina

7+2n=3-2n-8
Whakamahia te āhuatanga tohatoha hei whakarea te -2 ki te n+4.
7+2n=-5-2n
Tangohia te 8 i te 3, ka -5.
7+2n+2n=-5
Me tāpiri te 2n ki ngā taha e rua.
7+4n=-5
Pahekotia te 2n me 2n, ka 4n.
4n=-5-7
Tangohia te 7 mai i ngā taha e rua.
4n=-12
Tangohia te 7 i te -5, ka -12.
n=\frac{-12}{4}
Whakawehea ngā taha e rua ki te 4.
n=-3
Whakawehea te -12 ki te 4, kia riro ko -3.