Whakaoti i te 4(3-5b)=87

$$4 ( 3 - 5 b ) = 87$$

Whakaoti mō b

$$b = -\frac{15}{4} = -3\frac{3}{4} = -3.75$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakawehea ngā taha e rua ki te 4.

$$3-5b=\frac{87}{4}$$

Tangohia te 3 mai i ngā taha e rua.

$$-5b=\frac{87}{4}-3$$

Me tahuri te 3 ki te hautau \frac{12}{4}.

$$-5b=\frac{87}{4}-\frac{12}{4}$$

Tā te mea he rite te tauraro o \frac{87}{4} me \frac{12}{4}, me tango rāua mā te tango i ō raua taurunga.

$$-5b=\frac{87-12}{4}$$

Tangohia te 12 i te 87, ka 75.

$$-5b=\frac{75}{4}$$

Whakawehea ngā taha e rua ki te -5.

$$b=\frac{\frac{75}{4}}{-5}$$

Tuhia te \frac{\frac{75}{4}}{-5} hei hautanga kotahi.

$$b=\frac{75}{4\left(-5\right)}$$

Whakareatia te 4 ki te -5, ka -20.

$$b=\frac{75}{-20}$$

Whakahekea te hautanga \frac{75}{-20} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 5.

$$b=-\frac{15}{4}$$