ennifer is saving money to buy a bike. The bike cost $245. She has $125 saved, and each week she adds $15 to her savings. How long will it take to save enough money to buy the bike?
Initial savings $125
Savings increase by $15 per week
Let x represents the number of weeks and let y represent the total savings.
The savings increase by $15 per week. Since x represents the number of weeks, we can re-express the $15 per week as 15x.
The initial savings are $125.
The total savings y are then the initial savings increased by the increase per week: 125+15x
We know that the total savings y needs to be equal to the cost of the bike, which is $245.
Subtract 125 from each side of the equation:
Divide each side of the equation by 15:
Interchange the left and right side of the equation:
CONCLUSION: It will take Jennifer 8 weeks to save enough money to buy the bike.