Whakaoti i te 4(u-3)+5(u-7)=2(u+8)

$$4 ( u - 3 ) + 5 ( u - 7 ) = 2 ( u + 8 )$$

Whakaoti mō u

$$u=9$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te u-3.

$$4u-12+5\left(u-7\right)=2\left(u+8\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te 5 ki te u-7.

$$4u-12+5u-35=2\left(u+8\right)$$

Pahekotia te 4u me 5u, ka 9u.

$$9u-12-35=2\left(u+8\right)$$

Tangohia te 35 i te -12, ka -47.

$$9u-47=2\left(u+8\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te u+8.

$$9u-47=2u+16$$

Tangohia te 2u mai i ngā taha e rua.

$$9u-47-2u=16$$

Pahekotia te 9u me -2u, ka 7u.

$$7u-47=16$$

Me tāpiri te 47 ki ngā taha e rua.

$$7u=16+47$$

Tāpirihia te 16 ki te 47, ka 63.

$$7u=63$$

Whakawehea ngā taha e rua ki te 7.

$$u=\frac{63}{7}$$

Whakawehea te 63 ki te 7, kia riro ko 9.

$$u=9$$