Whakaoti mō z
z = \frac{168}{11} = 15\frac{3}{11} \approx 15.272727273
Tohaina
Kua tāruatia ki te papatopenga
6z-8+3z-4+2z=156
Whakareatia ngā taha e rua o te whārite ki te 2.
9z-8-4+2z=156
Pahekotia te 6z me 3z, ka 9z.
9z-12+2z=156
Tangohia te 4 i te -8, ka -12.
11z-12=156
Pahekotia te 9z me 2z, ka 11z.
11z=156+12
Me tāpiri te 12 ki ngā taha e rua.
11z=168
Tāpirihia te 156 ki te 12, ka 168.
z=\frac{168}{11}
Whakawehea ngā taha e rua ki te 11.
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