document.write( "Question 714844: a boy is three years older than his sister.the sum of their square ages is 369.how old are they \n" ); document.write( "
Algebra.Com's Answer #439023 by JAE96(1)\"\" \"About 
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369= (x+3)+ (x)\r
\n" ); document.write( "\n" ); document.write( "369= (2x + 3)\r
\n" ); document.write( "\n" ); document.write( "369 - 3 = 2x +3 -3\r
\n" ); document.write( "\n" ); document.write( "366/2=2x/2\r
\n" ); document.write( "\n" ); document.write( "183 = x (The sister's age)\r
\n" ); document.write( "\n" ); document.write( "183+3 = 186(The Brother's age)\r
\n" ); document.write( "\n" ); document.write( "Plug it back in...\r
\n" ); document.write( "\n" ); document.write( "369 (186)+(183)\r
\n" ); document.write( "\n" ); document.write( "369=369\r
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