Whakaoti mō y
y=20-2z
Whakaoti mō x
x\in \mathrm{R}
y=20-2z
Tohaina
Kua tāruatia ki te papatopenga
0x+5y+10z=100
Whakareatia te 0 ki te 5, ka 0.
0+5y+10z=100
Ko te tau i whakarea ki te kore ka hua ko te kore.
5y+10z=100
Ko te tau i tāpiria he kore ka hua koia tonu.
5y=100-10z
Tangohia te 10z mai i ngā taha e rua.
\frac{5y}{5}=\frac{100-10z}{5}
Whakawehea ngā taha e rua ki te 5.
y=\frac{100-10z}{5}
Mā te whakawehe ki te 5 ka wetekia te whakareanga ki te 5.
y=20-2z
Whakawehe 100-10z ki te 5.
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