Whakaoti i te (x+15%)+20%=745.2

$$(x+15 \% )+20 \% =745.2$$

Whakaoti mō x

$$x=744.85$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakahekea te hautanga \frac{15}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 5.

$$x+\frac{3}{20}+\frac{20}{100}=745.2$$

Whakahekea te hautanga \frac{20}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 20.

$$x+\frac{3}{20}+\frac{1}{5}=745.2$$

Ko te maha noa iti rawa atu o 20 me 5 ko 20. Me tahuri \frac{3}{20} me \frac{1}{5} ki te hautau me te tautūnga 20.

$$x+\frac{3}{20}+\frac{4}{20}=745.2$$

Tā te mea he rite te tauraro o \frac{3}{20} me \frac{4}{20}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$x+\frac{3+4}{20}=745.2$$

Tāpirihia te 3 ki te 4, ka 7.

$$x+\frac{7}{20}=745.2$$

Tangohia te \frac{7}{20} mai i ngā taha e rua.

$$x=745.2-\frac{7}{20}$$

Me tahuri ki tau ā-ira 745.2 ki te hautau \frac{7452}{10}. Whakahekea te hautanga \frac{7452}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$x=\frac{3726}{5}-\frac{7}{20}$$

Ko te maha noa iti rawa atu o 5 me 20 ko 20. Me tahuri \frac{3726}{5} me \frac{7}{20} ki te hautau me te tautūnga 20.

$$x=\frac{14904}{20}-\frac{7}{20}$$

Tā te mea he rite te tauraro o \frac{14904}{20} me \frac{7}{20}, me tango rāua mā te tango i ō raua taurunga.

$$x=\frac{14904-7}{20}$$

Tangohia te 7 i te 14904, ka 14897.

$$x=\frac{14897}{20}$$