document.write( "Question 10500: a+b=10.6
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document.write( "a+c=8.5
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document.write( "b+c=8.1
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document.write( "how much are a, b, c worth?\r
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document.write( "Please help .8th grade \n" );
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Algebra.Com's Answer #5569 by Earlsdon(6294) ![]() You can put this solution on YOUR website! You can solve this sytem of equations by the substution method.\r \n" ); document.write( "\n" ); document.write( "1) a + b = 10.6 or b = 10.6 - a \n" ); document.write( "2) a + c = 8.5 or c = 8.5 - a \n" ); document.write( "3) b + c = 8.1 Substitute the two above equations for b and c, then solve for a.\r \n" ); document.write( "\n" ); document.write( " (10.6 - a) + (8.5 - a) = 8.1 Simplify and solve for a. \n" ); document.write( "10.6 + 8.5 - 2a = 8.1 Add 2a to both sides. \n" ); document.write( "19.1 = 8.1 + 2a Subtract 8.1 from both sides. \n" ); document.write( "2a = 11 Divide both sides by 2 \n" ); document.write( "a = 5.5\r \n" ); document.write( "\n" ); document.write( "b = 10.6 - a \n" ); document.write( "b = 10.6 - 5.5 \n" ); document.write( "b = 5.1\r \n" ); document.write( "\n" ); document.write( "c = 8.5 - a \n" ); document.write( "c = 8.5 - 5.5 \n" ); document.write( "c = 3\r \n" ); document.write( "\n" ); document.write( "a = 5.5 \n" ); document.write( "b = 5.1 \n" ); document.write( "c = 3 \n" ); document.write( " |