Question

Steve started with $250 and spent $25 per week. Chelsea started with $30 and saved $30 per week. Use x for time and y for savings. How much money would be in their savings when it was the same amount?

Answer 1

the question is when are the two accounts equal... so our strategy is to find two equations and set them equal to each other

Explanation:

weeks = w

steve's acct. = 250-25w

Chelsea's acct. = 30 +30w

so when do they equal

250-25w = 30+30w

now solve for w

250-30 = 30w +25w

220 = 55w

4 = w

In four weeks.. they will have the same

so 250- 25(4) = 150

and to check 30+30(4) = 150

so the each have $150.00 in their accts at 4 weeks