I need the use of linear equations and/or inequalities to solve this real-life situations.
cell phone plan A charges a fixed cost of $300 (just an example) per month, which includes 300 text messages 20 minutes of call. Each additional minute, or part of a minute, for plan A cost $5.80. Cell phone plan B charges a fixed cost of $500 per month, which includes 250 text messages and 90 minutes of calls. Each additional minute, or part of a minute, for plan B costs $4.50. How many minutes of call needs to be used for the plans to have the same costs (either $300 or $500)

Question

I need the use of linear equations and/or inequalities to solve this real-life situations.
cell phone plan A charges a fixed cost of $300 (just an example) per month, which includes 300 text messages 20 minutes of call. Each additional minute, or part of a minute, for plan A cost $5.80. Cell phone plan B charges a fixed cost of $500 per month, which includes 250 text messages and 90 minutes of calls. Each additional minute, or part of a minute, for plan B costs $4.50. How many minutes of call needs to be used for the plans to have the same costs (either $300 or $500)