Answer:
Explanation:
Given equation:
Make c the subject:
Divide all terms by 0.9:
- c = 17.01/0.9 - 1.89r / 0.9
- c = 18.9 - 2.1r
Now make r the subject:
Divide all terms by 1.89:
- r = 17.01/1.89 - 0.9c/1.89
- r = 9 - 1/2.1c
- r = 9 - 10/21c
- r = - 10/21c + 9
Confirmed that both equations are equivalent with the initial one.
These are helpful when finding one of the variables if the value of another variable is given.