document.write( "Question 304834: In one year krity will be four rimes as old as danny. ten years from then krity will be twice as old as danny. how old is krity now?\r
\n" ); document.write( "\n" ); document.write( "Sat Prep questions.
\n" ); document.write( "Thank You. \n" ); document.write( "
Algebra.Com's Answer #218354 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
k = Krity's present age
\n" ); document.write( "d = Danny's present age
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement:
\n" ); document.write( ":
\n" ); document.write( "In one year krity will be four rimes as old as danny.
\n" ); document.write( "k+1 = 4(d+1)
\n" ); document.write( "k + 1 = 4d + 4
\n" ); document.write( "k = 4d + 4 - 1
\n" ); document.write( "k = 4d + 3
\n" ); document.write( ":
\n" ); document.write( "ten years from then krity will be twice as old as danny.
\n" ); document.write( "That will be 11 yrs from their present ages
\n" ); document.write( "k + 11 = 2(d + 11)
\n" ); document.write( "k + 11 = 2d + 22
\n" ); document.write( "k = 2d + 22 - 11
\n" ); document.write( "k = 2d + 11
\n" ); document.write( ":
\n" ); document.write( "Replace k with (4d+3) (from the 1st equation)
\n" ); document.write( "4d + 3 = 2d + 11
\n" ); document.write( "4d - 2d = 11 - 3
\n" ); document.write( "2d = 8
\n" ); document.write( "d = \"8%2F2\"
\n" ); document.write( "d = 4 yrs
\n" ); document.write( ":
\n" ); document.write( "Find k using the 1st equation
\n" ); document.write( "k = 4(4) + 3
\n" ); document.write( "k = 16 + 3
\n" ); document.write( "k = 19 yrs is Krity's age
\n" ); document.write( ";
\n" ); document.write( ":
\n" ); document.write( "Check solution in the 1st original equation
\n" ); document.write( "k + 1 = 4(d + 1)
\n" ); document.write( "19 + 1 = 4(4 + 1)
\n" ); document.write( "20 = 4(5)\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );