Question

-l0 = -2+1/2 d solved for d

Answer 1

$-10 =-2+ \dfrac{1}{2} d$ 

$-10=-2+ \dfrac{d}{2}$ 

$-10= \dfrac{d}{2} -2$     $Regroup \ terms$ 

$-10+2= \dfrac{d}{2}$     $Add \ 2 \ to \ both \ sides$ 

$-8= \dfrac{d}{2}$ 

$-8*2=d$      $Multiply \ both \ sides \ by \ 2$ 

$d=-16$