Whakaoti i te 1000(t-100)+3000(t-20)=0

$$1000 ( t - 100 ) + 3000 ( t - 20 ) = 0$$

Whakaoti mō t

$$t=40$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 1000 ki te t-100.

$$1000t-100000+3000\left(t-20\right)=0$$

Whakamahia te āhuatanga tohatoha hei whakarea te 3000 ki te t-20.

$$1000t-100000+3000t-60000=0$$

Pahekotia te 1000t me 3000t, ka 4000t.

$$4000t-100000-60000=0$$

Tangohia te 60000 i te -100000, ka -160000.

$$4000t-160000=0$$

Me tāpiri te 160000 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.

$$4000t=160000$$

Whakawehea ngā taha e rua ki te 4000.

$$t=\frac{160000}{4000}$$

Whakawehea te 160000 ki te 4000, kia riro ko 40.

$$t=40$$