CAN YALL PLZ HELP ME? I really need this.. Who founded the Ming dynasty? Zheng He Zhu Yuanzhang Marco Polo Kublai Khan

Zhu Yuanzhang

Explanation:

He founded it in 23 January 1368 – 25 April 1644. Hope this helps ;)

Let d = number of stamps from john (4 letters, d is 4th letter, etc) 
let e = number of stamps from johan 
let h = number of stamps from jonathan 

johan and jonathan have the same number of stamps, so:  

e = h 

2 times johan's collection is 11 less than 5 times john's collection, so:  

2e = 5d - 11 

3 times jonathan's collection is 3 less than 7 times john's collection,so:  

3h = 7d - 3 

now we have three equations and three unknowns. you're asked for the number of stamps in john's collection, so you want the value to variable "d". 

since e = h, we can substitute "h" for "e" in the second equation. 

2h = 5d - 11 
3h = 7d - 3 

now we have two equations and two unknowns. i'll use elimination, starting with multiplying the first equation by -3 and the second one by 2. 

-6h = -15d + 33 
6h = 14d - 6 

now add both together and you have an equation with one unknown remaining:  

0 = -d + 27 
d = 27 

so your answer is 27 stamps.