The total number of white characters is 0.28n×x, and the total number of sunspots is 0.72n×x x.
After taking 0.5n tablets,
The total number of Bai Zi is not listed, 0.28n×x, and the total number of sunspots is 0.72 n× x-0.5 n.
According to the relationship, the equation is given:
0.28 NX/(0.28n×x+0.72n×x-0.5n)= 0.32
X=4, used to solve the equation.
So there are four piles in the end.
1. Have any VIPs who have attended three schools ever stayed in class? 20 1 1 how about the VIP of the three schools?
This is the intro