Whakaoti i te 4(7y+2)-9(5-y)=-43

$$4 ( 7 y + 2 ) - 9 ( 5 - y ) = - 43$$

Whakaoti mō y

$$y=-\frac{6}{37}\approx -0.162162162$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te 7y+2.

$$28y+8-9\left(5-y\right)=-43$$

Whakamahia te āhuatanga tohatoha hei whakarea te -9 ki te 5-y.

$$28y+8-45+9y=-43$$

Tangohia te 45 i te 8, ka -37.

$$28y-37+9y=-43$$

Pahekotia te 28y me 9y, ka 37y.

$$37y-37=-43$$

Me tāpiri te 37 ki ngā taha e rua.

$$37y=-43+37$$

Tāpirihia te -43 ki te 37, ka -6.

$$37y=-6$$

Whakawehea ngā taha e rua ki te 37.

$$y=\frac{-6}{37}$$

Ka taea te hautanga \frac{-6}{37} te tuhi anō ko -\frac{6}{37} mā te tango i te tohu tōraro.

$$y=-\frac{6}{37}$$