Respuesta :

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A:MK <-175 if k >0, then m <-175/m, if k=0, no answers, if k <0,  then m >-175/m 


B: 5f=3c-55, then f = 3c-55/5

A:


-mk - 90 > 85


-mk - 90 + 90 > 85 + 90


-mk > 175


-mk / k > 175 / k


-m > 175/k


-m * -1 < 175/k * -1


m < -175/k



Part B:


3c - 5f = 55


3c - 5f - 3c = 55 - 3c


-5f = 55 - 3c


-5f/5 = (55 - 3c) / 5


-f = 55/5 - 3c/5





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