Whakaoti mō x
x=400
Graph
Tohaina
Kua tāruatia ki te papatopenga
x\times 0.8=80\times 4
Whakawehe 80 ki te \frac{1}{4} mā te whakarea 80 ki te tau huripoki o \frac{1}{4}.
x\times 0.8=320
Whakareatia te 80 ki te 4, ka 320.
x=\frac{320}{0.8}
Whakawehea ngā taha e rua ki te 0.8.
x=\frac{3200}{8}
Whakarohaina te \frac{320}{0.8} mā te whakarea i te taurunga me te tauraro ki te 10.
x=400
Whakawehea te 3200 ki te 8, kia riro ko 400.
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