Whakaoti mō x
x = -\frac{8}{7} = -1\frac{1}{7} \approx -1.142857143
Graph
Tohaina
Kua tāruatia ki te papatopenga
2x-2\left(15x+7\right)=18
Ko te tauaro o -7 ko 7.
2x-30x-14=18
Whakamahia te āhuatanga tohatoha hei whakarea te -2 ki te 15x+7.
-28x-14=18
Pahekotia te 2x me -30x, ka -28x.
-28x=18+14
Me tāpiri te 14 ki ngā taha e rua.
-28x=32
Tāpirihia te 18 ki te 14, ka 32.
x=\frac{32}{-28}
Whakawehea ngā taha e rua ki te -28.
x=-\frac{8}{7}
Whakahekea te hautanga \frac{32}{-28} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 4.
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