Concept explainers
Define a variable and write an equation for each situation. Then solve.
Susan’s cell phone plan allows her to use 950 minutes per month with no additional charge. She has 188 minutes left for this month. How many minutes has she already used this month?
To find: Number of used minutes when total 950 minutes allow for a month and only 188 minutes are left.
Answer to Problem 20P
Used minutes = 762
Explanation of Solution
Given information : Given that total 950 minutes per month with no additional charge and 188 minutes are left.
Suppose that x be the number of used minutes.
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