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Math Help - Need help on beginner algebra for exam!

  1. #1
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    Need help on beginner algebra for exam!

    3/7 (p + 4) = -6 what does "p" equal
    Is the first question and:
    4(a - 3/8) = -7/2 what does "a" equal?
    is the 2nd question.

    I would REALLY appreciate it if you could help.
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  2. #2
    Member
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    Mar 2008
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    Acolman, Mexico
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    Hi.

    So we have an equation like this
    3/7 (p + 4) = -6
    First, we are going to use the reciprocal of 3/7 to get rid of that exponent,
    Multiply both sides by 7/3
    (7/3)(3/7)(p+4)=-6(7/3)
    which yields
    p+4=-2(7)=-14
    Finally add -4 to both sides
    p+4-4=-14-4
    p=-18
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  3. #3
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    Acolman, Mexico
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    Now, with the second question

    4(a - 3/8) = -7/2
    First lets divide by 4 both sides (or conversely multiply by 1/4 both sides)
    (1/4)(4)(a - 3/8) = -7/2(1/4)
    a-3/8=-7/8
    Finally ad 3/8 to both sides
    a-3/8+3/8=-7/8+3/8
    a=-4/8=-1/2
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  4. #4
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    Thank you now I see where I went wrong
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