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Whakaoti mō x
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Tohaina

4x+12-x=24+x
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te x+3.
3x+12=24+x
Pahekotia te 4x me -x, ka 3x.
3x+12-x=24
Tangohia te x mai i ngā taha e rua.
2x+12=24
Pahekotia te 3x me -x, ka 2x.
2x=24-12
Tangohia te 12 mai i ngā taha e rua.
2x=12
Tangohia te 12 i te 24, ka 12.
x=\frac{12}{2}
Whakawehea ngā taha e rua ki te 2.
x=6
Whakawehea te 12 ki te 2, kia riro ko 6.