Yo does anyone know how do you solve x=2*y ?? It’s late and I’ve been stuck for a whole min lol

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

Convert 2000 swiss francs to dutch guilders

Ineed me i stuck and i don’t want to get it wrong