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Tohaina

70+11x+11=180
Tāpirihia te 31 ki te 39, ka 70.
81+11x=180
Tāpirihia te 70 ki te 11, ka 81.
11x=180-81
Tangohia te 81 mai i ngā taha e rua.
11x=99
Tangohia te 81 i te 180, ka 99.
x=\frac{99}{11}
Whakawehea ngā taha e rua ki te 11.
x=9
Whakawehea te 99 ki te 11, kia riro ko 9.