Question

Hannah was asked to make d the subject of the formula
d-7=4d+3/e
Finish her question.

Answer 1

`d = (-1)/(e) - (7)/(3)`

Explanation:

In order to make d the subject of the formula, you need to isolate it.

- You started with d-7 = 4d + 3/e

- Move 4d to the left side by subtracting 4d from both sides to cancel it from the right so you have...

d - 7 = 4d + 3/e This will leave you left with -3d - 7 = 3/e

-4d -4d

- Then move over the -7 by adding 7 to both sides...

-3d - 7 = 3/e This will leave you left with -3d = 3/e + 7

+7 +7

- Finally to get d by itself divide both sides of the equation by -3 and you'll be left with...

`d = (3)/(-3e) -(7)/(3)`

- You can cancel out the 3 in the -3/3e and make it -1/e so your final answer will be

`d = (-1)/(e) - (7)/(3)`