80 + 10x = 275 -15x
25x = 355
x = number of weeks.
Go back to the original 80 + 10x to find c.
2. You have $80 and your brother has $275 dollars. You save $10 of your allowance each week. Your brother spends his allowance plus $15 each week.
A. Write an equation to model this.
B. How long before you have as much money as your brother?
C. How much have you saved when you catch up to him?
1 answer