Answer:
256 text
Explanation:
Let's call the number of text messages Sarah sends in a month as "x".
So, the total cost of the text messages is $0.25 * x.
The total cost of the phone service and text messages is $35 + $0.25 * x = $99.
So, $35 + $0.25 * x = $99.
Subtracting $35 from both sides, we have:$0.25 * x = $99 - $35 = $64
Dividing both sides by $0.25, we have:x = 256
So, Sarah sent 256 text messages in one month.