Whakaoti i te (x+90)*89.5=100x+8000

$$(x+90) \times 89.5=100x+8000$$

Whakaoti mō x

$$x = \frac{110}{21} = 5\frac{5}{21} \approx 5.238095238$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te x+90 ki te 89.5.

$$89.5x+8055=100x+8000$$

Tangohia te 100x mai i ngā taha e rua.

$$89.5x+8055-100x=8000$$

Pahekotia te 89.5x me -100x, ka -10.5x.

$$-10.5x+8055=8000$$

Tangohia te 8055 mai i ngā taha e rua.

$$-10.5x=8000-8055$$

Tangohia te 8055 i te 8000, ka -55.

$$-10.5x=-55$$

Whakawehea ngā taha e rua ki te -10.5.

$$x=\frac{-55}{-10.5}$$

Whakarohaina te \frac{-55}{-10.5} mā te whakarea i te taurunga me te tauraro ki te 10.

$$x=\frac{-550}{-105}$$

Whakahekea te hautanga \frac{-550}{-105} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te -5.

$$x=\frac{110}{21}$$