You can
put this solution on YOUR website!Isolate the variables:
54 - 22.5 = 2c +

31.5 = 2c +
Multiply everything by c:
31.5c =

+ c

31.5c =

+ 5.7
Set = 0:

- 31.5c + 5.7 = 0
Multiply by 10 [to shift the decimal points]:

- 315c + 57 = 0
Apply the quadratic formula:
x =

=

=

=