document.write( "Question 1172156: A boy is y years old. His father is 31 years older than he is. The boy has a sister who is 3 years younger than the boy. The sum of their ages is 61 years (that is, the sum of the ages of boy, girl and father). How old is the boy? \n" ); document.write( "

Algebra.Com's Answer #797072 by ikleyn(52788) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "x = boy\r\n" );
document.write( "\r\n" );
document.write( "x+31 = father\r\n" );
document.write( "\r\n" );
document.write( "x-3 = sister.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The equation is\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "    x + (x+31) + (x-3) = 61.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The rest is on you.\r\n" );
document.write( "

\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );