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Mathematics 21 Online
OpenStudy (anonymous):

help me Simplify. https://crookcountysd.owschools.com/media/g_alg01_2013/10/259.gif

OpenStudy (aum):

You have to first find the least common denominator of 3, 5 and 7.

OpenStudy (anonymous):

help me do it you know i can do other ones

OpenStudy (aum):

LCM of 3, 5 and 7 is: 3 x 5 x 7 = 105 Multiply top and bottom by 105. That means each of the three terms on top and the term 1/x in the denominator will have to be multiplied by 105.

OpenStudy (anonymous):

oh ok thanks

OpenStudy (anonymous):

so then you do what

OpenStudy (aum):

\( \huge \frac{\frac 13 + \frac 15 - \frac 17}{\frac 1x} = \frac{(\frac 13 + \frac 15 - \frac 17)}{\frac 1x} \times \frac{105}{105} = \frac{35+21-15}{\frac{105}{x}} = \\ \huge \frac{41}{\frac{105}{x}} = 41 \times \frac{x}{105} = \frac{41x}{105} \)

OpenStudy (anonymous):

there is an easer way wow

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