Whakaoti mō x
x=-21
Graph
Tohaina
Kua tāruatia ki te papatopenga
3x+21-4=2\left(x-2\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te x+7.
3x+17=2\left(x-2\right)
Tangohia te 4 i te 21, ka 17.
3x+17=2x-4
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te x-2.
3x+17-2x=-4
Tangohia te 2x mai i ngā taha e rua.
x+17=-4
Pahekotia te 3x me -2x, ka x.
x=-4-17
Tangohia te 17 mai i ngā taha e rua.
x=-21
Tangohia te 17 i te -4, ka -21.
Ngā Tauira
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