Whakaoti mō x
x=75
Graph
Tohaina
Kua tāruatia ki te papatopenga
0.25x+54-0.2x=57.75
Whakamahia te āhuatanga tohatoha hei whakarea te 0.2 ki te 270-x.
0.05x+54=57.75
Pahekotia te 0.25x me -0.2x, ka 0.05x.
0.05x=57.75-54
Tangohia te 54 mai i ngā taha e rua.
0.05x=3.75
Tangohia te 54 i te 57.75, ka 3.75.
x=\frac{3.75}{0.05}
Whakawehea ngā taha e rua ki te 0.05.
x=\frac{375}{5}
Whakarohaina te \frac{3.75}{0.05} mā te whakarea i te taurunga me te tauraro ki te 100.
x=75
Whakawehea te 375 ki te 5, kia riro ko 75.
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