Question

carrie, Sam and ester have a total of $570. Carrie has $80 more than sam and ester has 5 times as much as sam. How much does each of them have?
Ms. Sue
s + s + 80 + 5s = 570

7s = 570 - 80

7s = 490

s = 70

Sam has $70.
Dell
in the answer what does the "S" represent, i having a hard time understanding how you came up with the snswer
Ms. Sue
S = Sam