Answer:100 text messages
Explanation:
Let x represent the total number of text messages that you sent over the plan for a Month.
A cell phone company charges a fixed income tax rate of $25 per month plus $0.05 for every text sent over the plan. This means that the total cost of x messages sent over the plan for a month would be
25 + 0.05x
If the total charge for the month is $30, then the total number of text messages that you sent over the plan for that month would be
30 = 25 + 0.05x
0.05x = 30 - 25 = 5
x = 5 / 0.05 = 100