document.write( "Question 968769: A is now three times older than B. In 5 years A will be twice as old as B will be then. Find their present ages.\r
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document.write( "I am an English teacher tutoring math and can't remember how to do this one. \n" );
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Algebra.Com's Answer #591930 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! A = 3B \n" ); document.write( "A +5 = 2(B +5) \n" ); document.write( "A +5 = 2B +10 \n" ); document.write( "now substitute for A = 3B \n" ); document.write( "3B +5 = 2B +10 \n" ); document.write( "subtract 2B form both sides of = \n" ); document.write( "B +5 = 10 \n" ); document.write( "B = 5 and A = 15 \n" ); document.write( "**************************** \n" ); document.write( "check answer by substituting for A and B in the second equation \n" ); document.write( "15 +5 = 2(5+5) \n" ); document.write( "20 = 20 \n" ); document.write( "our answer checks \n" ); document.write( " \n" ); document.write( " |