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?
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document.write( "i'm still convinced it's 88..can someone explain why it isn't 88 ? \n" );
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Algebra.Com's Answer #275396 by richard1234(7193)![]() ![]() You can put this solution on YOUR website! Let their current ages be a, b, c, d. We have (a+10) + (b+10) + (c+10) + (d+10) = 100 --> a + b + c + d = 60. In 7 years their total will be\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(a+7) + (b+7) + (c+7) + (d+7) = a + b + c + d + 28 = 60 + 28 = 88...strange... \n" ); document.write( " |