Question

5 sweets cost 30p altogether. How much do 7 sweets cost?

Answer 1

Well, first of all you have to compare
5 sweets=30p
7 sweets= x
   I represented the unknown with x. From here, you have to cross and multiply. 30 multiplies 7 and 5 multiplies x. And that will be
5x=210
  You have to remove all that is attached to x to find out what x is. To do this, you have to divide both sides by 5. That will be;
5x/5=210/5
  So; 
x=45
   So 7 sweets cost 45p. Hope i helped.

Answer 2

It would be 45p! I checked it with a calculator and checked it again with written method! Hope I helped! ;)