Solve for x \frac{x}{7} − \frac{x}{9} =−1

Question

Solve for x
\frac{x}{7} − \frac{x}{9} =−1

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Amity 4 years 2021-08-31T05:36:32+00:00 1 Answers 17 views 0

Answers ( )

  1. thachthao
    0
    2021-08-31T05:38:00+00:00
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    Answer:

    x = \frac{ - 63}{2} \: or \: - 31.5

    Step-by-step explanation:

    \frac{x}{7} - \frac{x}{9} = - 1

    Lets take the L.C.M of 7 & 9.

    L.C.M of 7 & 9 = 63

    = > \frac{9x - 7x}{63} = - 1

    = > \frac{2x}{ 63} = - 1

    Now lets multiply 63 on both the sides.

    = > \frac{2x}{ 63} \times 63 = (- 1) \times 63

    = > 2x = - 63

    Now lets divide both the sides by 2.

    = > \frac{2x}{2} = \frac{ - 63}{2}

    = > x = \frac{ - 63}{2} = - 31.5

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