Suppose you had d dollars in your bank account. you spent $12 but have at least $51 left. how much money did you have initially? write and solve an inequality that represents this situation.

For this case we must raise an inequality.

We have "d" dollars initially and they are spent 12. Then:

At least 51 dollars remain, then, the sign of inequality is greater or equal in favor of the expression, that is:

Resolving:

There are at least 63 dollars left in the account.