If you take 3.5 and divide it by 0.05, or times 20, that would make it 70.
Answer:
Given the statement:
9 less than the sum of x and 5
"Sum of x and 5" means 
"
" means subtract
then;
the statement 9 less than the sum of x and 5 becomes;
⇒
⇒
Therefore, the expression for the given statement is 
13 packs of meat patties and 16 packs of buns
5 Erasers, 4:1 is equal to 20:5, if you just multiply both numbers by 5