Using the variable m for month
Club A: Club B:
19m+11 19m+11=18m+15 18m+15
-18m -18m
m+11= 15
-11 -11
m=4
Check 19(4)+11 = 87 18(4)+15= 87
total cost = 87
Assuming the logarithm is base
, you have
1.25 cups of broth (I don't know what type of model you were looking for so I just made this)
The ratio 1: 3 means there is 1 red one and 3 blue ones.
For the ratio 3:1 there needs to be 3 red for every one blue.
You have 3 blue ones, so you would need 3 x 3 = 9 red ones.
You already have 1 red one so you would need 8 more.