Solve SA = ars + 1

for s

s = (SA - 1) / ar

Step-by-step explanation:

from the question SA = ars + 1 we want to make s the subject of the formulae

so from,

SA = ars + 1

SA - 1 = ars

divide both sides by ar

(SA - 1) / ar = ars/ar

(SA - 1) / ar = s

therefore,

s = (SA - 1) / ar