document.write( "Question 1107594: when I was 4 years old my sister was half my age. now i am 100 years, how old is my sister? \n" ); document.write( "
Algebra.Com's Answer #722593 by math_helper(2461)\"\" \"About 
You can put this solution on YOUR website!
98
\n" ); document.write( "——\r
\n" ); document.write( "\n" ); document.write( "4 / 2 = 2 so there is a 2yr difference in ages, and that difference is a constant.
\n" ); document.write( "
\n" );