It should be 0.4 or 4/10 or 2/5
The total meal costs = $6.75+$4.25+$5.50 =$16.5
The tip amounted to 16.5 x 18%=16.5 x 0.18 = $2.97
Total amount spent $16.5+$2.97 = $19.47
Since they want to share equally let's find the average= 19.47/3
Each one will pay $6.49
Answer:


Step-by-step explanation:
We have been given the equation:

And 
Second equation can be rewritten as:

We will solve the equations:
(1)
(2)
Multiply equation (1) by 5 and equation (2) by 3 we get:
(3)
(4)
Now, subtract (4) from (3) we get:


Now substitute
in equation (1) we get:




