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

Tohaina

40x-4-2=36
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 20x-2.
40x-6=36
Tangohia te 2 i te -4, ka -6.
40x=36+6
Me tāpiri te 6 ki ngā taha e rua.
40x=42
Tāpirihia te 36 ki te 6, ka 42.
x=\frac{42}{40}
Whakawehea ngā taha e rua ki te 40.
x=\frac{21}{20}
Whakahekea te hautanga \frac{42}{40} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.