In this exercise, the cost of a bike and weekly savings is related. The cost of the bike is given, and we need to use that cost to determine how long it will take to save enough money for the bike. We can rewrite the given information as algebraic expressions to create an equation for the number of weeks.
Given Information
Algebraic Expression
Weekly savings
15
Weeks of weekly savings
15w
The bike costs $245, she has $125 and weekly adds $15
245 = 125 + 15w
Now that we have the equation we can solve it for w, the number of weeks.
