Question

12. Julie had $400 in her savings account at the beginning of the summer. Each week she took

$20 out of her account. Stephen had $100 in his account at the beginning of summer. Each
week he added $30 to his account. After how many weeks did Julie and Stephen have the same
amount in their accounts?
y=400-20x
y=100-30x

Answer 1

We can find the number of weeks it took for Julie and Stephen to have the same amount in their accounts by setting their balance equal to each other and solving for x (the number of weeks).

400 - 20x = 100 + 30x
500 = 50x
x = 10

So, it took 10 weeks for Julie and Stephen to have the same amount in their accounts