Given:
S = 0.40M + 15.75
I = 0.15 M + 3.70
Let's find the equation for total charge C.
Let's write an equation relating C to M.
To write the equation, we have:
Now, add both equations:
Therefore, the equation relating C to M is:
C = 0.55M + 19.45
ANSWER:
C = 0.55M + 19.45