document.write( "Question 1023114: Make r the subject of the formula and simplify\r
\n" ); document.write( "\n" ); document.write( "1=E-e\R+r \n" ); document.write( "

Algebra.Com's Answer #638687 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
Assume you mean\r
\n" ); document.write( "\n" ); document.write( " $\"1+=+E+-+e%2F%28R%2Br%29\"$
\n" ); document.write( "Rearrange to
\n" ); document.write( "E - 1 = $\"e%2F%28R%2Br%29\"$
\n" ); document.write( "multiply both sides by (R+r)
\n" ); document.write( "(R+r)(E-1) = e
\n" ); document.write( "FOIL
\n" ); document.write( "RE - R + rE - r = e
\n" ); document.write( "Subtract RE and Add R to both sides
\n" ); document.write( "rE - r = e - RE + R
\n" ); document.write( "factor out r
\n" ); document.write( "r(E-1) = e - RE + R
\n" ); document.write( "Divide both sides by (E-1)
\n" ); document.write( "r = $\"%28e-RE%2BR%29%2F%28E-1%29\"$ \n" ); document.write( "

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