Whakaoti i te b-1/3-2b-2/5=1/2

$$\frac { b - 1 } { 3 } - \frac { 2 b - 2 } { 5 } = \frac { 1 } { 2 }$$

Whakaoti mō b

$$b = -\frac{13}{2} = -6\frac{1}{2} = -6.5$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Me whakarea ngā taha e rua o te whārite ki te 30, arā, te tauraro pātahi he tino iti rawa te kitea o 3,5,2.

$$10\left(b-1\right)-6\left(2b-2\right)=15$$

Whakamahia te āhuatanga tohatoha hei whakarea te 10 ki te b-1.

$$10b-10-6\left(2b-2\right)=15$$

Whakamahia te āhuatanga tohatoha hei whakarea te -6 ki te 2b-2.

$$10b-10-12b+12=15$$

Pahekotia te 10b me -12b, ka -2b.

$$-2b-10+12=15$$

Tāpirihia te -10 ki te 12, ka 2.

$$-2b+2=15$$

Tangohia te 2 mai i ngā taha e rua.

$$-2b=15-2$$

Tangohia te 2 i te 15, ka 13.

$$-2b=13$$

Whakawehea ngā taha e rua ki te -2.

$$b=\frac{13}{-2}$$

Ka taea te hautanga \frac{13}{-2} te tuhi anō ko -\frac{13}{2} mā te tango i te tohu tōraro.

$$b=-\frac{13}{2}$$