Question

How to do this question plz answer me ​

Answer 1

`d = (4 - 3c)/(c + 1)`

Explanation:

To make d the subject of formula, we need to rearrange the equation such that we arrive at d= _____.

`c = (4 - d)/(d + 3)`

Remove the fraction by multiplying (d +3) on both sides:

`c(d + 3) = 4 - d`

Expand:

`cd + 3c = 4 - d`

Bring all the d terms to one side and move the others to the other side of the equation:

`cd + d = 4 - 3c`

Factorise d out:

`d(c + 1) = 4 - 3c`

Divide by (c +1) on both sides:

`d = (4 - 3c)/(c + 1)`