Whakaoti i te left(1-0.15right)x=left(x-500right)0.75+500*0.9

$$\left( 1-0.15 \right) x = \left( x-500 \right) 0.75+500 \times 0.9$$

Whakaoti mō x

$$x=750$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Tangohia te 0.15 i te 1, ka 0.85.

$$0.85x=\left(x-500\right)\times 0.75+500\times 0.9$$

Whakamahia te āhuatanga tohatoha hei whakarea te x-500 ki te 0.75.

$$0.85x=0.75x-375+500\times 0.9$$

Whakareatia te 500 ki te 0.9, ka 450.

$$0.85x=0.75x-375+450$$

Tāpirihia te -375 ki te 450, ka 75.

$$0.85x=0.75x+75$$

Tangohia te 0.75x mai i ngā taha e rua.

$$0.85x-0.75x=75$$

Pahekotia te 0.85x me -0.75x, ka 0.1x.

$$0.1x=75$$

Whakawehea ngā taha e rua ki te 0.1.

$$x=\frac{75}{0.1}$$

Whakarohaina te \frac{75}{0.1} mā te whakarea i te taurunga me te tauraro ki te 10. Ka whakawehea he tau ki te tahi, hua ai ko ia anō.

$$x=750$$