Suppose you had d dollars in your bank account. You spent $9 but have at least $40 left. How much money did you have initially? Write and solve an inequality that represents this situation.
d - 9 > 40
To find out how much money you had initially, we need to solve an inequality. Let's break down the problem.
Let's say you initially had d dollars in your bank account. You spent $9, so you would have d - 9 dollars left. According to the given information, you still have at least $40 left, so we can write the inequality:
d - 9 ≥ 40
To solve this inequality, we can isolate the variable d by adding 9 to both sides:
d ≥ 40 + 9
Simplifying, we get:
d ≥ 49
Therefore, you initially had at least $49 in your bank account.