write an equation

Question

Tanya has a certain amount of money in her account. Each month, for 6 months, she deposit $50 less than her original savings amount. After 6 months, she has a total of $750 in her account. How much money did she have in the account before she began adding money to it  ?

Answer 1

Keisha, let's let m = the amount of money originally in her account.  Each month, she deposited m - 50, right?

 

So, we have the original amount, m, plus 6 months of m - 50 turns into $750

 

m + 6(m -50) = 750

 

Hope this helps!