What are the rules of 1,3,8,19,39,71118
The difference between the above numbers is 2511203247, and the difference between the above numbers is 3691215, which is an arithmetic sequence
How to calculate 21-120% + x = 9!
21-120%+x=9
21-1.2+x=9
x=9-21+1.2
x=-10.8
Solving equation (100-80) * (120 / 80-x) = 100 * 10% x + 80x
20*(1.5-x)=90x
30-20x=90x
30=110x
x=3/11
Solution equation: 76-80% x = 60
76-80%X=60
0.8x=76-60
0.8x=16
x=16/0.8
x=20