document.write( "Question 510453: This is an age old problwm.\r
\n" );
document.write( "\n" );
document.write( "My mum was 27 when i was born. 8 Years ago she was twice as old as i shall be in 5 years, time. How old am i now \n" );
document.write( "
Algebra.Com's Answer #341822 by Maths68(1474)![]() ![]() You can put this solution on YOUR website! Let \n" ); document.write( "Present age of Mother = m \n" ); document.write( "Present age of Son = s\r \n" ); document.write( "\n" ); document.write( "Given \n" ); document.write( "======= \n" ); document.write( "When the son was born mother was 27, means mother is 27 older than son \n" ); document.write( "m=s+27..............(1)\r \n" ); document.write( "\n" ); document.write( "8 years ago means we have to subtract 8 from their present ages \n" ); document.write( "m-8=s-8\r \n" ); document.write( "\n" ); document.write( "then mother was twice as old as son will be in 5 means we have add 5 in the age of the son 8 years ago \n" ); document.write( "(m-8)=2((s-8)+5) \n" ); document.write( "m-8=2s-16+10 \n" ); document.write( "m-8=2s-6 \n" ); document.write( "m=2s-6+8 \n" ); document.write( "m=2s+2...........(2) \n" ); document.write( "============================================== \n" ); document.write( "Put the value of m from (1) to (2) \n" ); document.write( "s+27=2s+2 \n" ); document.write( "s-2s=2-27 \n" ); document.write( "-s=-25 \n" ); document.write( "Multiply by (-1) both sides \n" ); document.write( "-s(-1)=-25(-1) \n" ); document.write( "s=25 \n" ); document.write( "Put the value of s in (1) \n" ); document.write( "m=s+27 \n" ); document.write( "m=25+27 \n" ); document.write( "m=52 \n" ); document.write( "Present age of Mother = m = 52 years old \n" ); document.write( "Present age of Son = s = 25 years old \n" ); document.write( " \n" ); document.write( " |