Sauder has three times as much money as Sony. Sammy has $4 less than Sauder and $5 more than Sony. How much money does each have?
Why they all have names with the same letters! :P Anyway, let's call Sauder
- Sauder has three times as much money as Sony
- Sammy has $4 less than Sauder
- Sammy has $5 more than Sony
And let's solve the system. Given the first equation, we can substitute
Now that we know