Whakaoti i te 0.25a+(2500-a)*0.5leq1000

$$0.25 a + ( 2500 - a ) \cdot 0.5 \leq 1000$$

Whakaoti mō a

$$a\geq 1000$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te 2500-a ki te 0.5.

$$0.25a+1250-0.5a\leq 1000$$

Pahekotia te 0.25a me -0.5a, ka -0.25a.

$$-0.25a+1250\leq 1000$$

Tangohia te 1250 mai i ngā taha e rua.

$$-0.25a\leq 1000-1250$$

Tangohia te 1250 i te 1000, ka -250.

$$-0.25a\leq -250$$

Whakawehea ngā taha e rua ki te -0.25. I te mea he tōraro a -0.25, ka huri te ahunga koreōrite.

$$a\geq \frac{-250}{-0.25}$$

Whakarohaina te \frac{-250}{-0.25} mā te whakarea i te taurunga me te tauraro ki te 100.

$$a\geq \frac{-25000}{-25}$$

Whakawehea te -25000 ki te -25, kia riro ko 1000.

$$a\geq 1000$$