document.write( "Question 531889: if a+b = 35
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document.write( "and 2a + 4b = 94
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document.write( "how do you find a and b? \n" );
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Algebra.Com's Answer #350784 by boilpoil(127)![]() ![]() You can put this solution on YOUR website! a+b=35\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "2a+4b=94 ---You need to make b the subject to insert the equation into 'b' \n" ); document.write( "4b=94-2a \n" ); document.write( "b=(94-2a)/4\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "a+(94-2a)/4=35 \n" ); document.write( "4a+94-2a=140 \n" ); document.write( "2a=46 \n" ); document.write( "a=23\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "b=(94-2(23))/4 ---Substitute a=23 into 'a' \n" ); document.write( "b=(94-46)/4 \n" ); document.write( "b=48/4 \n" ); document.write( "b=12\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "And 23+12=35 \n" ); document.write( " |