Whakaoti i te 800*0.1(t-130)+400(t-10)=0

$$800 \times 0.1 ( t - 130 ) + 400 ( t - 10 ) = 0$$

Whakaoti mō t

$$t=30$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te 800 ki te 0.1, ka 80.

$$80\left(t-130\right)+400\left(t-10\right)=0$$

Whakamahia te āhuatanga tohatoha hei whakarea te 80 ki te t-130.

$$80t-10400+400\left(t-10\right)=0$$

Whakamahia te āhuatanga tohatoha hei whakarea te 400 ki te t-10.

$$80t-10400+400t-4000=0$$

Pahekotia te 80t me 400t, ka 480t.

$$480t-10400-4000=0$$

Tangohia te 4000 i te -10400, ka -14400.

$$480t-14400=0$$

Me tāpiri te 14400 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.

$$480t=14400$$

Whakawehea ngā taha e rua ki te 480.

$$t=\frac{14400}{480}$$

Whakawehea te 14400 ki te 480, kia riro ko 30.

$$t=30$$