Kristen started the year with 635 in the bank and is saving $35 a week. Casey started the year with $835 and is spending $15 a week What’s kristen’s equation?

What’s Casey’s equation?

when will they have the same amount of money in the bank?

Given :

Kristen started the year with $635 in the bank and is saving $35 a week.

Casey started the year with $835 and is spending $15 a week.

To Find :

Kristen’s equation.

Casey’s equation.

When will they have the same amount of money in the bank.

Solution :

Since, Kristen is saving $35 every month, price increase in x months :

Also, Casey is spending $15 month.

Now, let after n months both have same amount of money in the bank :

So,

Therefore, they have same amount of money after 4 months.