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Whakaoti mō x
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Tohaina

10-x-x=-10
Tangohia te x mai i ngā taha e rua.
10-2x=-10
Pahekotia te -x me -x, ka -2x.
-2x=-10-10
Tangohia te 10 mai i ngā taha e rua.
-2x=-20
Tangohia te 10 i te -10, ka -20.
x=\frac{-20}{-2}
Whakawehea ngā taha e rua ki te -2.
x=10
Whakawehea te -20 ki te -2, kia riro ko 10.