document.write( "Question 132938: Please help me solve this problem:\r
\n" ); document.write( "\n" ); document.write( "1/a+1/b=1/C if a=10 and c=4. Find b. \n" ); document.write( "

Algebra.Com's Answer #97138 by MathLover1(20849) $\"\"$ $\"About$

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$\"1%2Fa%2B1%2Fb=1%2FC\"$ \r
\n" ); document.write( "\n" ); document.write( " if $\"a=10\"$ and $\"c=4\"$ , then \r
\n" ); document.write( "\n" ); document.write( " $\"1%2Fb=1%2FC+-%281%2Fa%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"1%2Fb=%28a+-C%29%2FCa%29\"$ .....cross multiply\r
\n" ); document.write( "\n" ); document.write( " $\"Ca+=b%28a+-C%29+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"+b=C%2Aa%2F%28a+-C%29\"$ ....plug in values for $\"a\"$ and $\"C\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"+b=%284%2A10a%29%2F%2810+-4%29\"$ ....\r
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\n" ); document.write( "\n" ); document.write( " $\"+b=%2840%2Aa%29%2F6\"$ ....\r
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\n" ); document.write( "\n" ); document.write( " $\"b=6.6666666666666666666666666666667\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"b=6.7\"$ \r
\n" ); document.write( "\n" ); document.write( "check:
\n" ); document.write( " $\"1%2Fa%2B1%2Fb=1%2FC\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"1%2F10%2B1%2F6.7=1%2F4\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"0.1%2B0.15=0.25\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"0.25=0.25\"$ \r
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