Question 85627
Solve for c:

54=(2c)+22.5+(5.7/c)
2c-31.5+(5.7/c)=0
-----------------
Multiply thru by c to get:

2c^2-31.5c+5.7 = 0
20c^2-315c+57 = 0
c=[315+-sqrt(315^2-4*20*57)/40
c=[315+-307.68]/40
c= 0.18 or c=15.57
{{{graph(400,300,-5,20,-1200,750,20x^2-315x+57)}}}
===========
Cheers,
stan H.