Please show all steps for solving for s Thank you in advance

Please show all steps for solving for s.

Thank you in advance!

Solving for s. 1/S + 1/-S/3 = 1/-20 S = 40

Solution

1/s + 1/-s/3 = -1/20

1/s -3/s = -1/20

take s as common denominator on LHS

(1 -3)/s = -1/20

-2/s = -1/20

multiply both sides by 20 :

-2*20/s = -1

multilply both sides by s :

(-40/s)s = -s

-40 = -s

s = 40 ( solution)