Whakaoti mō z
z=10
Tohaina
Kua tāruatia ki te papatopenga
5z+2z=70
Me whakarea ngā taha e rua o te whārite ki te 10, arā, te tauraro pātahi he tino iti rawa te kitea o 2,5.
7z=70
Pahekotia te 5z me 2z, ka 7z.
z=\frac{70}{7}
Whakawehea ngā taha e rua ki te 7.
z=10
Whakawehea te 70 ki te 7, kia riro ko 10.
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