HELP M Given segment TV and point U that lies on TV, find TU if TV = 21, TU= -31 - 7z, and VU = -39 - 6z

TU =

TU = 18

Step-by-step explanation:

TV =  21

TU + VU = 21

-31 - 7z  + (-39 - 6z) = 21

-31 - 7z  - 39 - 6z = 21

-7z - 6z - 31 - 39 = 21  {Combine like terms}

-13z - 70 = 21       {Add 70 to both sides}

-13z = 21 + 70

-13z = 91     {divide both side by (-13)}

  z = 91/-13

z = -7

TU = -31 - 7z

    = -31 - 7*(-7)

    = - 31 + 49

     = 18

answer: it's upside down and i can't read it

step-by-step explanation:

5+2x=a

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