Check the attached file and let me know what you think.
As a function this is x=3 y=3
6/10 and 13/20, sorry i would explain this but its late, cheers.
Hope this Helps.
5a - 10*3 = 45
5a - 30 = 45
5a = 45 + 30
5a = 75
a = 15
Answer:

Step-by-step explanation:
GIVEN: In the
school year in country A, there were
foreign students from country B. This number is
more than the number of students from country C.
TO FIND: How many foreign students were from country C.
SOLUTION:
Total foreign students from country B 
let the foreign students from country C be 
As the students from country B is
more than the country C
Students from country B



Hence the number of students from country C are 