Tīpoka ki ngā ihirangi matua
Whakaoti mō x
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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

4-2x-3x=-21
Tangohia te 3x mai i ngā taha e rua.
4-5x=-21
Pahekotia te -2x me -3x, ka -5x.
-5x=-21-4
Tangohia te 4 mai i ngā taha e rua.
-5x=-25
Tangohia te 4 i te -21, ka -25.
x=\frac{-25}{-5}
Whakawehea ngā taha e rua ki te -5.
x=5
Whakawehea te -25 ki te -5, kia riro ko 5.