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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

4y-1-3y=15
Tangohia te 3y mai i ngā taha e rua.
y-1=15
Pahekotia te 4y me -3y, ka y.
y=15+1
Me tāpiri te 1 ki ngā taha e rua.
y=16
Tāpirihia te 15 ki te 1, ka 16.