Whakaoti i te 3(x+1)-5(x-1)=-21

$$3 ( x + 1 ) - 5 ( x - 1 ) = - 21$$

Whakaoti mō x

$$x = \frac{29}{2} = 14\frac{1}{2} = 14.5$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te x+1.

$$3x+3-5\left(x-1\right)=-21$$

Whakamahia te āhuatanga tohatoha hei whakarea te -5 ki te x-1.

$$3x+3-5x+5=-21$$

Pahekotia te 3x me -5x, ka -2x.

$$-2x+3+5=-21$$

Tāpirihia te 3 ki te 5, ka 8.

$$-2x+8=-21$$

Tangohia te 8 mai i ngā taha e rua.

$$-2x=-21-8$$

Tangohia te 8 i te -21, ka -29.

$$-2x=-29$$

Whakawehea ngā taha e rua ki te -2.

$$x=\frac{-29}{-2}$$

Ka taea te hautanga \frac{-29}{-2} te whakamāmā ki te \frac{29}{2} mā te tango tahi i te tohu tōraro i te taurunga me te tauraro.

$$x=\frac{29}{2}$$