Whakaoti mō x
x = \frac{19}{3} = 6\frac{1}{3} \approx 6.333333333
Graph
Tohaina
Kua tāruatia ki te papatopenga
2x+1+x+1=21
Pahekotia te x me x, ka 2x.
3x+1+1=21
Pahekotia te 2x me x, ka 3x.
3x+2=21
Tāpirihia te 1 ki te 1, ka 2.
3x=21-2
Tangohia te 2 mai i ngā taha e rua.
3x=19
Tangohia te 2 i te 21, ka 19.
x=\frac{19}{3}
Whakawehea ngā taha e rua ki te 3.
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