Answer:
7 ordered with Soda;
3 ordered with water
Step-by-step explanation:
Given
With water
With Soda
So:
--- total
-- cost
Required
Find m and n

Make m the subject

Substitute
in 


Collect like terms



Solve for n





Good news: they are all like terms
9x + 5x -3x -8x = 3x
Using the quadratic equation we get:

Factoring out 2 we get

Factoring out the imaginary number:

So b.
U technecally wrote the answer