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math

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2│2x-7│+11=25

  • math -

    You want to get the absolute value portion of the equation alone first. They you can find what x would equal if it were (2x-7) = blah and if -(2x-7) = blah.

  • math -

    2„ 2x-7„ +11=25
    -11 -11
    2„ 2x-7„  =14
    4x +14 = 14
    -14 -14
    4x = 0 Divide both by 4
    x = 0
    Check
    2„ 2(0)-7„ +11=25
    2„ 0 -7„ +11=25
    2„ -7„ +11=25
    14 + 11 =25
    25 =25

  • math -

    in addition to x=0, x=7

    2[2x-7]+11=25
    2[2x-7]=14
    [2x-7]=7
    2x=14
    x=7
    Check
    2[2(7)-7]+11=25
    2[7]+11=25
    14+11=25
    25=25 :D

  • math -

    2│2x-7│+11=25
    |2x-7| = 7

    then 2x-7 = 7 or -2x + 7 = 7
    2x = 14 or 2x = 0
    x = 7 or x = 0

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