Whakaoti i te 9x+1.2=(-x+0.8/2+0.8)*10

$$9 x + 1.2 = ( - \frac { x + 0.8 } { 2 } + 0.8 ) \cdot 10$$

Whakaoti mō x

$$x=0.2$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia ngā taha e rua o te whārite ki te 2.

$$18x+2.4=2\left(-\frac{x+0.8}{2}+0.8\right)\times 10$$

Whakareatia te 2 ki te 10, ka 20.

$$18x+2.4=20\left(-\frac{x+0.8}{2}+0.8\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te 20 ki te -\frac{x+0.8}{2}+0.8.

$$18x+2.4=20\left(-\frac{x+0.8}{2}\right)+16$$

Whakawehea ia wā o x+0.8 ki te 2, kia riro ko \frac{1}{2}x+0.4.

$$18x+2.4=20\left(-\left(\frac{1}{2}x+0.4\right)\right)+16$$

Hei kimi i te tauaro o \frac{1}{2}x+0.4, kimihia te tauaro o ia taurangi.

$$18x+2.4=20\left(-\frac{1}{2}x-0.4\right)+16$$

Whakamahia te āhuatanga tohatoha hei whakarea te 20 ki te -\frac{1}{2}x-0.4.

$$18x+2.4=20\left(-\frac{1}{2}\right)x-8+16$$

Tuhia te 20\left(-\frac{1}{2}\right) hei hautanga kotahi.

$$18x+2.4=\frac{20\left(-1\right)}{2}x-8+16$$

Whakareatia te 20 ki te -1, ka -20.

$$18x+2.4=\frac{-20}{2}x-8+16$$

Whakawehea te -20 ki te 2, kia riro ko -10.

$$18x+2.4=-10x-8+16$$

Tāpirihia te -8 ki te 16, ka 8.

$$18x+2.4=-10x+8$$

Me tāpiri te 10x ki ngā taha e rua.

$$18x+2.4+10x=8$$

Pahekotia te 18x me 10x, ka 28x.

$$28x+2.4=8$$

Tangohia te 2.4 mai i ngā taha e rua.

$$28x=8-2.4$$

Tangohia te 2.4 i te 8, ka 5.6.

$$28x=5.6$$

Whakawehea ngā taha e rua ki te 28.

$$x=\frac{5.6}{28}$$

Whakarohaina te \frac{5.6}{28} mā te whakarea i te taurunga me te tauraro ki te 10.

$$x=\frac{56}{280}$$

Whakahekea te hautanga \frac{56}{280} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 56.

$$x=\frac{1}{5}$$