Whakaoti mō x
x=3
Graph
Tohaina
Kua tāruatia ki te papatopenga
3+2x-18=12-7x
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te x-9.
-15+2x=12-7x
Tangohia te 18 i te 3, ka -15.
-15+2x+7x=12
Me tāpiri te 7x ki ngā taha e rua.
-15+9x=12
Pahekotia te 2x me 7x, ka 9x.
9x=12+15
Me tāpiri te 15 ki ngā taha e rua.
9x=27
Tāpirihia te 12 ki te 15, ka 27.
x=\frac{27}{9}
Whakawehea ngā taha e rua ki te 9.
x=3
Whakawehea te 27 ki te 9, kia riro ko 3.
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