Whakaoti i te 30.8=2*22/7*x

$$30.8=2 \times \frac{ 22 }{ 7 } \times x$$

Whakaoti mō x

$$x=4.9$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Tuhia te 2\times \frac{22}{7} hei hautanga kotahi.

$$30.8=\frac{2\times 22}{7}x$$

Whakareatia te 2 ki te 22, ka 44.

$$30.8=\frac{44}{7}x$$

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

$$\frac{44}{7}x=30.8$$

Me whakarea ngā taha e rua ki te \frac{7}{44}, te tau utu o \frac{44}{7}.

$$x=30.8\times \frac{7}{44}$$

Me tahuri ki tau ā-ira 30.8 ki te hautau \frac{308}{10}. Whakahekea te hautanga \frac{308}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$x=\frac{154}{5}\times \frac{7}{44}$$

Me whakarea te \frac{154}{5} ki te \frac{7}{44} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$x=\frac{154\times 7}{5\times 44}$$

Mahia ngā whakarea i roto i te hautanga \frac{154\times 7}{5\times 44}.

$$x=\frac{1078}{220}$$

Whakahekea te hautanga \frac{1078}{220} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 22.

$$x=\frac{49}{10}$$