Ko te mahi hei whakaoti whārite taurangi, arā, he panoni i te whārite kia kitea ai te otinga, kia rerekē rānei te tumu o te whārite. Ko te tikanga matua, kia ōrite te rāwekeweke i ia taha o te whārite kia noho ōrite tonu ai.
The activity required to solve an algebraic equation, to change the equation so the solution can be found, or so there is a different subject of the equation. The principal convention is that the manipulation must be the same on each side of the equation so that the equality is maintained.