Jason’s bank account balance was $300. He paid 1/4 of his bills. Now, his account balance is -$50. Which equation can be used to find x, the total dollar amount of his bills?
Let x be the total dollar amount of his bills.
He paid x/4 of his bills.
His bank account balance is 300 - x/4 = -50.
Combining like terms, we get 250 = x/4.
Multiplying both sides by 4, we get x = 1000.
Therefore, the equation that can be used to find x is 250 = x/4. Answer: \boxed{250 = \frac{x}{4}}.