Whakaoti mō c
c=-14
Tohaina
Kua tāruatia ki te papatopenga
20+4c=3\left(2+c\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te 5+c.
20+4c=6+3c
Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te 2+c.
20+4c-3c=6
Tangohia te 3c mai i ngā taha e rua.
20+c=6
Pahekotia te 4c me -3c, ka c.
c=6-20
Tangohia te 20 mai i ngā taha e rua.
c=-14
Tangohia te 20 i te 6, ka -14.
Ngā Tauira
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