Whakaoti i te 4200*2(100-x)=4200*1(x-20)

$$4200 \times 2(100-x)=4200 \times 1(x-20)$$

Whakaoti mō x

$$x = \frac{220}{3} = 73\frac{1}{3} \approx 73.333333333$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Me whakakore te 4200 ki ngā taha e rua.

$$2\left(100-x\right)=1\left(x-20\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 100-x.

$$200-2x=1\left(x-20\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te 1 ki te x-20.

$$200-2x=x-20$$

Tangohia te x mai i ngā taha e rua.

$$200-2x-x=-20$$

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

$$200-3x=-20$$

Tangohia te 200 mai i ngā taha e rua.

$$-3x=-20-200$$

Tangohia te 200 i te -20, ka -220.

$$-3x=-220$$

Whakawehea ngā taha e rua ki te -3.

$$x=\frac{-220}{-3}$$

Ka taea te hautanga \frac{-220}{-3} te whakamāmā ki te \frac{220}{3} mā te tango tahi i te tohu tōraro i te taurunga me te tauraro.

$$x=\frac{220}{3}$$