Respuesta :

strickla574

Answer: r=L - s  / L

s=l(1−r)

Step 1: Flip the equation.

−lr+l=s

Step 2: Add -l to both sides.

−lr+l+−l=s+−l

−lr=−l+s

Step 3: Divide both sides by -l.

−lr

−l

=

−l+s

−l

r=

l−s

l

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