Rewrite the equation as .
Multiply each term by and simplify.
Multiply each term in by .
Cancel the common factor of .
Cancel the common factor.
Rewrite the expression.
Simplify .
Apply the distributive property.
Simplify the expression.
Multiply by .
Rewrite using the commutative property of multiplication.
Rewrite the equation as .
Subtract from both sides of the equation.
Divide each term by and simplify.
Divide each term in by .
Simplify .
Dividing two negative values results in a positive value.
Cancel the common factor of .
Cancel the common factor.
Divide by .
Simplify each term.
Move the negative in front of the fraction.
Dividing two negative values results in a positive value.
Cancel the common factor of .
Cancel the common factor.
Divide by .
Solve for r s=c/(1-r)