Question

What is the value of a in A-17/3=-20?

Answer 1

$\dfrac{A-17}{3}=-20\qquad|\cdot3\\\\A-17=-60\qquad|+17\\\\A=-43$

$A-\dfrac{17}{3}=-20\\\\A-\dfrac{17}{3}=\dfrac{-60}{3}\qquad|+\dfrac{17}{3}\\\\A=-\dfrac{43}{3}$