document.write( "Question 726445: 5 years ago radha age was 7 tymes of her daughter.her age will be 3 tymes of her daughter in 5 years.then what is the age of radha? \n" ); document.write( "
Algebra.Com's Answer #444586 by mananth(16946)\"\" \"About 
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let daughter's age =x
\n" ); document.write( "Radha's age =y\r
\n" ); document.write( "\n" ); document.write( "5 years ago\r
\n" ); document.write( "\n" ); document.write( "y-5=7(x-5)
\n" ); document.write( "y-5=7x-35
\n" ); document.write( "y-7x=-30........................(1)\r
\n" ); document.write( "\n" ); document.write( "5 years later\r
\n" ); document.write( "\n" ); document.write( "y+5=3(x+5)
\n" ); document.write( "y+5=3x+15
\n" ); document.write( "y-3x=10.........................(2)\r
\n" ); document.write( "\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -1
\n" ); document.write( "Multiply (2) by 1
\n" ); document.write( "7 x -1 y = 30
\n" ); document.write( "-3 x + 1 y = 10
\n" ); document.write( "Add the two equations
\n" ); document.write( "4 x = 40
\n" ); document.write( "/ 4
\n" ); document.write( "x = 10
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "-7 x + 1 y = -30
\n" ); document.write( "-70 + y = -30
\n" ); document.write( " y = -30 + 70
\n" ); document.write( " y = 40
\n" ); document.write( " y = 40
\n" ); document.write( "x= 10
\n" ); document.write( "y= 40
\n" ); document.write( "m.ananth@hotmail.ca
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