Maria contributes to a savings account at a rate represented by the expression $$5x + 3$$ every month, where $$x$$ is the number of months she has been saving. Ahmed deposits a fixed amount of $$15$$ each month.

After $$n$$ months, her total savings can be represented as follows:

Maria's total savings: $$S_M = 5n + 3n$$

Ahmed's total savings: $$S_A = 15n$$

At a certain point, Maria's total savings will be three times Ahmed's total savings. Which equation correctly represents that scenario?