document.write( "Question 976963: A woman has a son and a daughter. The mother is three times as old as her son. The son is seven years older then the daughter. Three years from now the boy will be twice as old as his sister will be. What are the three linear equations for this problem ? \n" ); document.write( "
Algebra.Com's Answer #598450 by FrankM(1040)\"\" \"About 
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M=3S\r
\n" ); document.write( "\n" ); document.write( "S=D+7\r
\n" ); document.write( "\n" ); document.write( "S+3=2(D+3)\r
\n" ); document.write( "\n" ); document.write( "Above is the answer. To complete the problem, we can add 3 to the second equation, both sides.\r
\n" ); document.write( "\n" ); document.write( "S+3=D+10\r
\n" ); document.write( "\n" ); document.write( "Then set an equation as follows:\r
\n" ); document.write( "\n" ); document.write( "2(D+3)=D+10\r
\n" ); document.write( "\n" ); document.write( "2D+6=D+10\r
\n" ); document.write( "\n" ); document.write( "D=4, S=11, M=33
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