Soccer balls

Pupils in one class want to buy two soccer balls together. If each of them brings 12.50 euros, they will miss 100 euros, if each brings 16 euros, they will remain 12 euros. How many students are in the class?

Correct result:

n =  32

Solution:

 12.50 n+100=16 n12  3.5n=112  n=32



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