Whakaoti i te 2x+(80-x)2=4(80-x)-6

$$2 x + ( 80 - x ) 2 = 4 ( 80 - x ) - 6$$

Whakaoti mō x

$$x = \frac{77}{2} = 38\frac{1}{2} = 38.5$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 80-x ki te 2.

$$2x+160-2x=4\left(80-x\right)-6$$

Pahekotia te 2x me -2x, ka 0.

$$160=4\left(80-x\right)-6$$

Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te 80-x.

$$160=320-4x-6$$

Tangohia te 6 i te 320, ka 314.

$$160=314-4x$$

Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.

$$314-4x=160$$

Tangohia te 314 mai i ngā taha e rua.

$$-4x=160-314$$

Tangohia te 314 i te 160, ka -154.

$$-4x=-154$$

Whakawehea ngā taha e rua ki te -4.

$$x=\frac{-154}{-4}$$

Whakahekea te hautanga \frac{-154}{-4} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te -2.

$$x=\frac{77}{2}$$