Whakaoti i te -3(u+9)+21geq5(2-u)

$$- 3 ( u + 9 ) + 21 \geq 5 ( 2 - u )$$

Whakaoti mō u

$$u\geq 8$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te -3 ki te u+9.

$$-3u-27+21\geq 5\left(2-u\right)$$

Tāpirihia te -27 ki te 21, ka -6.

$$-3u-6\geq 5\left(2-u\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te 5 ki te 2-u.

$$-3u-6\geq 10-5u$$

Me tāpiri te 5u ki ngā taha e rua.

$$-3u-6+5u\geq 10$$

Pahekotia te -3u me 5u, ka 2u.

$$2u-6\geq 10$$

Me tāpiri te 6 ki ngā taha e rua.

$$2u\geq 10+6$$

Tāpirihia te 10 ki te 6, ka 16.

$$2u\geq 16$$

Whakawehea ngā taha e rua ki te 2. I te mea he tōrunga te 2, kāore e huri te ahunga koreōrite.

$$u\geq \frac{16}{2}$$

Whakawehea te 16 ki te 2, kia riro ko 8.

$$u\geq 8$$