document.write( "Question 134116: Suppose y varies directly as x and that y=21 when x=3. Find the value of y when x=5. \n" ); document.write( "
Algebra.Com's Answer #98083 by jojo14344(1513)\"\" \"About 
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By Ratio and Proportion;\r
\n" ); document.write( "\n" ); document.write( "1st condition; x=3 and y=21
\n" ); document.write( "2nd condition; x=5 and y=?
\n" ); document.write( "so,
\n" ); document.write( "3/21 = 5/y
\n" ); document.write( "y = 5 * 21 /3
\n" ); document.write( "y = 35\r
\n" ); document.write( "\n" ); document.write( "It is just right to be y=35 (as shown by ratio above)as it varies directly to x.
\n" ); document.write( "When x goes up, so does y goes up!
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