Whakaoti mō φ
\phi =-4
Tohaina
Kua tāruatia ki te papatopenga
\phi -8-3\phi =0
Tangohia te 3\phi mai i ngā taha e rua.
-2\phi -8=0
Pahekotia te \phi me -3\phi , ka -2\phi .
-2\phi =8
Me tāpiri te 8 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.
\phi =\frac{8}{-2}
Whakawehea ngā taha e rua ki te -2.
\phi =-4
Whakawehea te 8 ki te -2, kia riro ko -4.
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