solve for u?

277= 178 -u

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  • 1 decade ago
    Favorite Answer

    You remind me of my old school days, Are you really serious you don't know the answer?

    But anyway this is the way you do it...

    277=178-u

    every time you swap a number to the other side of the '=' (equal) sighn, the number changes to be the opposite value of what it was....

    Like this

    277-178=-u

    178 has now become -178

    now 277-178 is 99

    therefore 99=-u

    the questions asks you to solve for U not -U

    Now we have to swap sides so -u becomes U and 99 becomes -99.

    Here is the Full mathematical solution

    277 = 178 - U

    277 - 178 = - U

    99 =- U

    0 = - U-99 (optional step)

    therefore U = - 99

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  • 1 decade ago

    277 = 178 - u

    Transpose u

    277 + u = 178 - u + u

    277 + u = 178

    Transpose 277

    277 + u - 277 = 178 - 277

    u = - 99

    - - - - - - -s-

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  • Joel L
    Lv 6
    1 decade ago

    Subtract 178 from both sides

    277 - 178 = -u

    99 = -u

    Multiply both sides by -1

    -99 = u <<=== answer

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  • 1 decade ago

    its just one step above regular addition or subtraction,dont let the letters confuse yo, just like saying 277-178,the the -u is like -1. = -99

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  • 1 decade ago

    u = -99

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