document.write( "Question 497843: ted is 10 times as old as his daughter sarah. in four years he will only be 6 times as old as she. How old is sara? \n" ); document.write( "
Algebra.Com's Answer #338053 by Maths68(1474)\"\" \"About 
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Let
\n" ); document.write( "Present age of Ted = t
\n" ); document.write( "Present age of Sara = s
\n" ); document.write( "Ted is 10 times as old as his daughter Sara
\n" ); document.write( "t=10s.......(1)
\n" ); document.write( "In four years mean we have to add 4 in the present age of Ted and Sara
\n" ); document.write( "t+4=s+4
\n" ); document.write( "then, Ted will only be 6 times as old as Sara
\n" ); document.write( "t+4=6(s+4)
\n" ); document.write( "t+4=6s+24
\n" ); document.write( "t=6s+24-4
\n" ); document.write( "t=6s+20 ...........(2)
\n" ); document.write( "Put the value of t from (1) to (2)
\n" ); document.write( "t=6s+20
\n" ); document.write( "10s=6s+20
\n" ); document.write( "10s-6s=20
\n" ); document.write( "4s=20
\n" ); document.write( "Divide by 4 both sides of the equation
\n" ); document.write( "4s/4=20/4
\n" ); document.write( "s=5
\n" ); document.write( "Put the value of s in (1)
\n" ); document.write( "t=10s.......(1)
\n" ); document.write( "t=10(5)
\n" ); document.write( "t=50
\n" ); document.write( "Present age of Ted = 50
\n" ); document.write( "Present age of Sara = 5\r
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