Whakaoti i te x=117*90-13*9^2/2

$$x = 117 \times 90 - 13 \times 9 ^ { 2 } / 2$$

Whakaoti mō x

$$x = \frac{20007}{2} = 10003\frac{1}{2} = 10003.5$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te 117 ki te 90, ka 10530.

$$x=10530-\frac{13\times 9^{2}}{2}$$

Tātaihia te 9 mā te pū o 2, kia riro ko 81.

$$x=10530-\frac{13\times 81}{2}$$

Whakareatia te 13 ki te 81, ka 1053.

$$x=10530-\frac{1053}{2}$$

Me tahuri te 10530 ki te hautau \frac{21060}{2}.

$$x=\frac{21060}{2}-\frac{1053}{2}$$

Tā te mea he rite te tauraro o \frac{21060}{2} me \frac{1053}{2}, me tango rāua mā te tango i ō raua taurunga.

$$x=\frac{21060-1053}{2}$$

Tangohia te 1053 i te 21060, ka 20007.

$$x=\frac{20007}{2}$$

Tautapa x

$$x≔\frac{20007}{2}$$