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what is the advantage of multiplying both sides of the equation by the least common multiple of the denominators in the first step?
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what is the advantage of multiplying both sides of the equation by the least common multiple of the denominators in the first step?

User Jiyda Moussa
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Well thats a rule, but what do you mean? When adding or multiplying fractions we need to have the same common denominator. 
User Mohamed Gaber
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