Question

4D -7 equals 21 solve for D

Answer 1

Answer: 7

Explanation:

4D-7=21

4D=21+7

4D=28

D=7

Answer 2

The answer is:

d = 7

Work/explanation:

The equation is:

`\sf{4d-7=21}`

Add 7 on each side

`\sf4d-7+7=21+7}`

Simplify

`\sf{4d=28}`

Divide each side by 4

`\sf{d=7}`

Therefore, d = 7.