Question

21=cd+e for d solve for indicated variable

Answer 1

Cd+e = 21

Cd + e - e = 21 - e

Cd = 21 - e

Cd/C = 21-e/C

d = 21-e/C.

Answer 2

$Cd+e = 21$    $Equation$

$Cd + e - e = 21 - e$  $Subtract \ e \ from \ both \ sides$

$Cd = 21 - e$    $Simplify$

$Cd/C = 21-e/C$  $Divide \ both \ sides \ by \ C$

$d = 21-e/C.$  $Solution$