Question 260319
Let
Tea = (1/5)C
Coffee = (2/5)C + 6
Soda = 20
The total number of customers = C.
we get
{{{(1/5)C + (2/5)C+6 + 20 = C}}}
multiply everything by 5 to get
{{{C + 2C + 30 + 100 = 5C}}}
subtract 3 C to get
{{{130 = 2C}}}
divide to get
{{{C =65}}} customers