To find out how much money Byron had in his savings account before he bought the winter coat, we can set up the following equation:
Let \( x \) be the amount of money Byron had initially in his savings account. After spending $40 on the coat, he had $80 left. Therefore, we can write the equation:
\[ x - 40 = 80 \]
Now, we can solve for \( x \):
-
Add 40 to both sides: \[ x = 80 + 40 \]
-
Simplify: \[ x = 120 \]
So, Byron had $120 in his savings account before he bought the winter coat.
The correct answer is \( x = 120 \).