This entire expression gives the total number of apples required to make 2 pies and 4 cakes.
x is the number of apples for a cake. 3x would be the number of apples it takes to make a pie. 2(3x) would be the apples for 2 pies and 4(x) would be the number of apples for 4 cakes.
From the following figure:
Because the center angle measure 45 degrees, we must rotate 3 times 45 degrees to get point D.
In other words, we must rotate
that is 135 degrees clockwise.
From right to left
2
20
200
2000
20000
200000
F (x)=(x+4)/6
f-1 (7)=x
f (f-1 (7)=f (x)
7=f (X)
7=(x+4)/6
x+4=42
x=38
900*.3=270
trade discount = $270
net price is the rest so
900-270=630
net price=$630
The net price is the amount they have to pay after subtracting the discounts.