Question:

Help to solve this equation? thxx!?

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3 6

---- = ----

x x-1

Set up: fraction

3 over x equals 6 over x-1

could someone please show me how to solve this? thankkk yoooouuu! i would appreciate it! i totally forgot how to do this! and i need some review. steps would be helpful

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4 ANSWERS


  1. 3/x=6/(x-1)

    x(3/x=6/(x-1))

    3=6x/(x-1)

    (x-1)(3=6x/(x-1))

    3(x-1)=6x

    3x-3=6x

    -3=3x

    -1=x

    3/-1=6/(-1-1)

    3/-1=6/-2

    -3=-3


  2. You've got to cross multiply. So, the next solution will be:

    3(x-1)=6x

    3x-3=6x distribute

    -3x=3 transpose

    x=-1 divide both sides by -3

  3. do cross multiply or cross products whatever you want to call it.

    6x = 3x - 3

    subtract 3x

    3x = -3

    divide by 3

    x = -1

    put -1 back into the equation for x to check the answer

    3 / -1 = 6 / -1 - 1

    -3 = -3

    since -3 = -3 the answer is right.

  4. cross multiply. you'll get 6x=3x-3

    subtract 3x from 6x

    3x=-3

    divide by 3

    x= -1

    then check the answer

    6(-1)=3(-1)-3

    -6=-3-3

    -6=-6

    3 over -1 equals 6 over -2

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