Whakaoti mō x
x=-3.8
Graph
Tohaina
Kua tāruatia ki te papatopenga
1.2-x-\left(-0.8\right)=-2\left(0.9+x\right)
Hei kimi i te tauaro o x-0.8, kimihia te tauaro o ia taurangi.
1.2-x+0.8=-2\left(0.9+x\right)
Ko te tauaro o -0.8 ko 0.8.
2-x=-2\left(0.9+x\right)
Tāpirihia te 1.2 ki te 0.8, ka 2.
2-x=-1.8-2x
Whakamahia te āhuatanga tohatoha hei whakarea te -2 ki te 0.9+x.
2-x+2x=-1.8
Me tāpiri te 2x ki ngā taha e rua.
2+x=-1.8
Pahekotia te -x me 2x, ka x.
x=-1.8-2
Tangohia te 2 mai i ngā taha e rua.
x=-3.8
Tangohia te 2 i te -1.8, ka -3.8.
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