The problem
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I totally do not understand the solution. Why isn't it showing the steps?
Answer provided by our tutors
The only step required is defining a common denominator.
The denominator will be 'abc', hence each term is multiplied by the 'missing piece'. For example, "1/(ab)" must be multiplied by "c/c" in order to obtain 'abc' in the denominator and that leaves 'c' in the numerator. Each of the three terms is handled in the same manner.
