document.write( "Question 860918: Ratios\r
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\n" ); document.write( "\n" ); document.write( "if a: b =3 : 4, the value of (2a + 3 b) : (3a+4b)is
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Algebra.Com's Answer #518706 by mananth(16946)\"\" \"About 
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a: b =3 : 4, the value of (2a + 3 b) : (3a+4b)is\r
\n" ); document.write( "\n" ); document.write( "\"a%2Fb+=3+%2F4\"\r
\n" ); document.write( "\n" ); document.write( "\"a%2F3+=b%2F4\"\r
\n" ); document.write( "\n" ); document.write( "Let \"a%2F3+=b%2F4=+k\"\r
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\n" ); document.write( "\n" ); document.write( "a=3k
\n" ); document.write( "b=4k
\n" ); document.write( "(2a + 3 b) : (3a+4b)\r
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\n" ); document.write( "\n" ); document.write( "(2*3k + 3 *4k) / (3*3k+4*4k)\r
\n" ); document.write( "\n" ); document.write( "(6k+12k)/(9k+16k)\r
\n" ); document.write( "\n" ); document.write( "(18k)/(25k)\r
\n" ); document.write( "\n" ); document.write( "=18/25
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