Whakaoti i te 3.2(25-a)+2.7aleq50

$$3.2 ( 25 - a ) + 2.7 a \leq 50$$

Whakaoti mō a

$$a\geq 60$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te 3.2 ki te 25-a.

$$80-3.2a+2.7a\leq 50$$

Pahekotia te -3.2a me 2.7a, ka -0.5a.

$$80-0.5a\leq 50$$

Tangohia te 80 mai i ngā taha e rua.

$$-0.5a\leq 50-80$$

Tangohia te 80 i te 50, ka -30.

$$-0.5a\leq -30$$

Whakawehea ngā taha e rua ki te -0.5. I te mea he tōraro a -0.5, ka huri te ahunga koreōrite.

$$a\geq \frac{-30}{-0.5}$$

Whakarohaina te \frac{-30}{-0.5} mā te whakarea i te taurunga me te tauraro ki te 10.

$$a\geq \frac{-300}{-5}$$

Whakawehea te -300 ki te -5, kia riro ko 60.

$$a\geq 60$$