
In linear equation, 4 Â is the maximum whole number of gigabytes of data he can use while staying within his budget.
What are a definition and an example of a linear equation?
Let the number of gigabyte so f data she can use while staying within her budget then,
we can write the cost equation as following
 4x + 66.50 ) ≤ 85
  85 - 66.50 ≤ 4x
  18.5 ≤ 4x
  x ≤ 18.5/4
  x ≤ 4. 625
  Xmax =  4
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