Algebra

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please help me to figure out in algebra 2/3-4/5-(-11/15) +7/10-5/2 the answer is 6/5 and I do not know how to work this out

  • Algebra -

    2 / 3 - 4 / 5 - ( - 11 / 15 ) + 7 / 10 - 5 / 2 =

    2 / 3 - 4 / 5 + 11 / 15 + 7 / 10 - 5 / 2

    ______________________________________

    Least Common factor = 30

    2 / 3 = 20 / 30

    4 / 5 = 4 * 6 / ( 5 * 6 ) = 24 / 30

    11 / 15 = 2 * 11 / ( 2 * 15 ) = 22 / 30

    7 / 10 = 3 * 7 / ( 3 * 10 ) = 21 / 30

    5 / 2 = 15 * 5 / ( 15 * 2 ) = 75 / 30

    _______________________________________


    2 / 3 - 4 / 5 + 11 / 15 + 7 / 10 - 5 / 2 =

    20 / 30 - 24 / 30 + 22 / 30 + 21 / 30 - 75 / 30 =

    - 36 / 30 = - 6 * 6 / ( 6 * 5 ) = - 6 / 5

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