document.write( "Question 388958: There are two brothers and two sisters. in 10 years they will total 100 in their ages. How much will the total be in 7 years?
\n" ); document.write( "i'm still convinced it's 88..can someone explain why it isn't 88 ?
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Algebra.Com's Answer #275401 by jerryguo41(197)\"\" \"About 
You can put this solution on YOUR website!
a,b,c,d = Siblings
\n" ); document.write( "\"a%2B10%2Bb%2B10%2Bc%2B10%2Bd%2B10=100\" ------- Plus Ten due to \"In ten years\"
\n" ); document.write( "\"a%2Bb%2Bc%2Bd%2B40=100\"
\n" ); document.write( "\"a%2Bb%2Bc%2Bd=60\"\r
\n" ); document.write( "\n" ); document.write( "\"a%2Bb%2Bc%2Bd%2B28=x\" ------- \"plus 7 years\"
\n" ); document.write( "\"40%2B28=x\" ---- a+b+c+d=40
\n" ); document.write( "\"68=x\"
\n" ); document.write( "So in 7 years their added ages will be 68
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