Whakaoti i te x-20geq2left(x+4-20right)

$$x-20 \geq 2 \left( x+4-20 \right)$$

Whakaoti mō x

$$x\leq 12$$

Ngā Upane Otinga

Tangohia te 20 i te 4, ka -16.

$$x-20\geq 2\left(x-16\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te x-16.

$$x-20\geq 2x-32$$

Tangohia te 2x mai i ngā taha e rua.

$$x-20-2x\geq -32$$

Pahekotia te x me -2x, ka -x.

$$-x-20\geq -32$$

Me tāpiri te 20 ki ngā taha e rua.

$$-x\geq -32+20$$

Tāpirihia te -32 ki te 20, ka -12.

$$-x\geq -12$$

Whakawehea ngā taha e rua ki te -1. I te mea he tōraro a -1, ka huri te ahunga koreōrite.

$$x\leq \frac{-12}{-1}$$

Ka taea te hautanga \frac{-12}{-1} te whakamāmā ki te 12 mā te tango tahi i te tohu tōraro i te taurunga me te tauraro.

$$x\leq 12$$