Whakaoti mō x
x=-4
Graph
Tohaina
Kua tāruatia ki te papatopenga
9x-\left(14+2x\right)=-42
Whakareatia ngā taha e rua o te whārite ki te 3.
9x-14-2x=-42
Hei kimi i te tauaro o 14+2x, kimihia te tauaro o ia taurangi.
7x-14=-42
Pahekotia te 9x me -2x, ka 7x.
7x=-42+14
Me tāpiri te 14 ki ngā taha e rua.
7x=-28
Tāpirihia te -42 ki te 14, ka -28.
x=\frac{-28}{7}
Whakawehea ngā taha e rua ki te 7.
x=-4
Whakawehea te -28 ki te 7, kia riro ko -4.
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