Whakaoti i te 2left(400-600xright)-6.5*2=2-200x-15

$$2 \left( 400-600x \right) -6.5 \cdot 2 = 2-200x-15$$

Whakaoti mō x

$$x=0.8$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 400-600x.

$$800-1200x-6.5\times 2=2-200x-15$$

Whakareatia te 6.5 ki te 2, ka 13.

$$800-1200x-13=2-200x-15$$

Tangohia te 13 i te 800, ka 787.

$$787-1200x=2-200x-15$$

Tangohia te 15 i te 2, ka -13.

$$787-1200x=-13-200x$$

Me tāpiri te 200x ki ngā taha e rua.

$$787-1200x+200x=-13$$

Pahekotia te -1200x me 200x, ka -1000x.

$$787-1000x=-13$$

Tangohia te 787 mai i ngā taha e rua.

$$-1000x=-13-787$$

Tangohia te 787 i te -13, ka -800.

$$-1000x=-800$$

Whakawehea ngā taha e rua ki te -1000.

$$x=\frac{-800}{-1000}$$

Whakahekea te hautanga \frac{-800}{-1000} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te -200.

$$x=\frac{4}{5}$$