document.write( "Question 987580: If a varies directly as b, a=20, when b=4, find a when b=a \n" ); document.write( "

Algebra.Com's Answer #608308 by vleith(2983) $\"\"$ $\"About$

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A varies directly as b. Let the constant of variability be K. So
\n" ); document.write( " $\"a+=+Kb\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"20+=+K%2A4\"$
\n" ); document.write( " $\"5+=+K\"$ \r
\n" ); document.write( "\n" ); document.write( "Our equation is $\"a+=+5b\"$ \r
\n" ); document.write( "\n" ); document.write( "You are asked for a value of b that results in a=b. I am not sure if that means find a when b=20 or find the value where a is equal to b.\r
\n" ); document.write( "\n" ); document.write( "The only way a=b is when b=0
\n" ); document.write( "If b = 20, the a=100 \n" ); document.write( "

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