x>23/5 is the answer
The friend makes a calculation error.
5x - 11 > 12
5x > 12 + 11
5x > 23
x > 23/5
A "mathematical error" when the calculation you entered makes mathematical sense, but the result cannot be calculated. B. If you try to divide by zero or the result is too large.
error, in applied mathematics, the difference between a true value and an estimate or approximation of that value. A common example in statistics is the difference between the mean of an entire population and the mean of a sample drawn from that population.
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