Whakaoti mō x
x=6
Graph
Tohaina
Kua tāruatia ki te papatopenga
0.5x+9.1-0.7x=7.9
Whakamahia te āhuatanga tohatoha hei whakarea te 0.7 ki te 13-x.
-0.2x+9.1=7.9
Pahekotia te 0.5x me -0.7x, ka -0.2x.
-0.2x=7.9-9.1
Tangohia te 9.1 mai i ngā taha e rua.
-0.2x=-1.2
Tangohia te 9.1 i te 7.9, ka -1.2.
x=\frac{-1.2}{-0.2}
Whakawehea ngā taha e rua ki te -0.2.
x=\frac{-12}{-2}
Whakarohaina te \frac{-1.2}{-0.2} mā te whakarea i te taurunga me te tauraro ki te 10.
x=6
Whakawehea te -12 ki te -2, kia riro ko 6.
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