document.write( "Question 564609: Please help me understand how to solve this.\r
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document.write( "t+m=2.10
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document.write( "2t+3m=5.15 \n" );
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Algebra.Com's Answer #365393 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! t + m = 2.10 \n" ); document.write( "2t+3m = 5.15 \n" ); document.write( ": \n" ); document.write( "We are going use elimination here: \n" ); document.write( "multiply the 1st equation by 2 and subtract from the 2nd equation \n" ); document.write( "2t + 3m = 5.15 \n" ); document.write( "2t + 2m = 4.20 \n" ); document.write( "---------------subtraction eliminates t, find m \n" ); document.write( "0t + m = .95 \n" ); document.write( "m = .95 \n" ); document.write( ": \n" ); document.write( "Find t using the 1st equation, replace m with .95 \n" ); document.write( "t + .95 = 2.10 \n" ); document.write( "t = 2.10 - .95 \n" ); document.write( "t = 1.15 \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check our solution of t=1.15 and m=.95 in the 2nd equation \n" ); document.write( "2t + 3m = 5.15 \n" ); document.write( "replace t and m \n" ); document.write( "2(1.15) + 3(.95 = \n" ); document.write( "2.30 + 2.85 = 5.15 which is correct \n" ); document.write( "; \n" ); document.write( "How about now, do you understand this? \n" ); document.write( " |