document.write( "Question 1007730: six years ago the ratio of kunal and sager age is 6:5,hence 4 years later the ratio becomes 11:10.then what is kunal's present age? \n" ); document.write( "

Algebra.Com's Answer #623640 by fractalier(6550) $\"\"$ $\"About$

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\n" ); document.write( "We can solve this using two proportions, which will give us two equations to solve from...we have (using k and s for their ages NOW)...
\n" ); document.write( "%28k-6%29%2F%28s-6%29+=+6%2F5 and %28k%2B4%29+%2F+%28s%2B4%29+=+11%2F10
\n" ); document.write( "If we cross-multiply these we get
\n" ); document.write( "5(k-6) = 6(s-6)
\n" ); document.write( "5k - 30 = 6s - 36
\n" ); document.write( "5k - 6s = -6
\n" ); document.write( "and
\n" ); document.write( "10(k+4) = 11(s+4)
\n" ); document.write( "10k + 40 = 11s + 44
\n" ); document.write( "10k - 11s = 4
\n" ); document.write( "Double the first one and subtract
\n" ); document.write( "10k - 11s = 4
\n" ); document.write( "-(10k - 12s = -12)
\n" ); document.write( "----------------
\n" ); document.write( "s = 16
\n" ); document.write( "k = 18 \n" ); document.write( "

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