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March 29, 2017

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1.8=[(5.0-x)/100]/[x/150]

Solve for x

  • Math - ,

    1.8 = (5-x)/100 * 150/x
    = 150/100 * (5-x)/x
    = 3/2 (5/x - 1)
    9/5 = 15/2x - 3/2
    9/5 + 3/2 = 15/2x
    33/10 = 15/2x
    10/33 = 2x/15
    10/33 * 15/2 = x
    x = 150/66 = 25/11

  • St.Francis' College - ,

    1.8=[(5.0-x)/100]/(x/150)
    1.8 =[(5.0-x)/100]*150/x
    1.8=(5.0-x)150/100* x

    1.8 =[(5*150)-(x*150)]/100x
    1.8= 750-150x/100x
    1.8*100x=750-150x
    180x=750-150x
    180x+150x=750
    330x=750
    divide through by330
    330x/330=750/330
    x=2.27

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