Question

a phone plan has a limit of $25 that can be spent on text messages. the base cost of the text plan will cost a user $5. each text will cost $0.05. how many text messages can a user send without exceeding the plan limits

Answer 1

$25 - 5 = 20$
20 is after the base cost
$400 \times .05 = 20.00$
400 text messages can be sent without exceeding the limit.

Answer 2

0.05x + 5 = y

0.05x + 5 ≤ 25

          - 5   - 5

0.05x      ≤ 20

$\frac{0.05}{0.05}x$ ≤ $\frac{20}{0.05}$

        x ≤ 400

Answer: 400 text messages