Whakaoti i te z=15/4-5/2*7/5*2

$$z = \frac { 15 } { 4 } - \frac { 5 } { 2 } \times \frac { 7 } { 5 } \cdot 2$$

Whakaoti mō z

$$z = -\frac{13}{4} = -3\frac{1}{4} = -3.25$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Me whakarea te \frac{5}{2} ki te \frac{7}{5} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$z=\frac{15}{4}-\frac{5\times 7}{2\times 5}\times 2$$

Me whakakore tahi te 5 i te taurunga me te tauraro.

$$z=\frac{15}{4}-\frac{7}{2}\times 2$$

Me whakakore te 2 me te 2.

$$z=\frac{15}{4}-7$$

Me tahuri te 7 ki te hautau \frac{28}{4}.

$$z=\frac{15}{4}-\frac{28}{4}$$

Tā te mea he rite te tauraro o \frac{15}{4} me \frac{28}{4}, me tango rāua mā te tango i ō raua taurunga.

$$z=\frac{15-28}{4}$$

Tangohia te 28 i te 15, ka -13.

$$z=-\frac{13}{4}$$

Tautapa z

$$z≔-\frac{13}{4}$$