Frequent Questions about our Solver

The problem

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how do I know if I need to apply the formula in step 2 to get to step 3?

Answer provided by our tutors

You want to add the fractions, and the formula is explaining how the adding is done:

Lowest common denominator (LCD) for '5(a - 4)' and '(a - 4)' is '5(a - 4)' thus we have:

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