A bank wants us to build an ATM for which there are three limitations. First one is that number of bank notes must be 97 , being of 10€,20€ and m€. Second one is that the total amount must be 1330€. And third one is that the number of 10€ notes must be double than the number of 20€ones.
Find a system of equations to check, using it, if ATM is doable. Explain your answer.