document.write( "Question 261619: Hello! I was hoping you could help me with a question. \"One train leaves city A heading for city B which is 390 miles away. At the same time a second train leaves city B heading for city A, Going 15 mph faster then the first train. If they meet in 3 hours and 20 minutes how fast were the trains traveling?
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document.write( "I keep trying to put it in the formula 3.2(x)+ 3.2(x-15)=390 from there I get (simplified) 6.4x= 438\r
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document.write( "Please tell me where i'm going wrong
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document.write( "Thank you so much.
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document.write( "Vincent \n" );
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Algebra.Com's Answer #192741 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! \"One train leaves city A heading for city B which is 390 miles away. At the same time a second train leaves city B heading for city A, Going 15 mph faster then the first train. If they meet in 3 hours and 20 minutes how fast were the trains traveling? \n" ); document.write( "---------------------------- \n" ); document.write( "Train A DATA: \n" ); document.write( "rate = x mph ; time = 3 1/3 = 10/3 hrs ; distance = rt = (10/3)x miles \n" ); document.write( "---------------------------- \n" ); document.write( "Train B DATA: \n" ); document.write( "rate = x+15 mph ; time = (10/3) hrs ; distance = rt = (10/3)(x+15) miles \n" ); document.write( "------------------------ \n" ); document.write( "Equation: \n" ); document.write( "A distance + B distance = 390 miles \n" ); document.write( "(10/3)x + (10/3)(x+15) = 390 \n" ); document.write( "10x + 10(x+15) = 1170 \n" ); document.write( "20x + 150 = 1170 \n" ); document.write( "20x = 1020 \n" ); document.write( "x = 51 mph (Train A rate) \n" ); document.write( "x+15 = 66 mph (Train B rate) \n" ); document.write( "================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "I keep trying to put it in the formula 3.2(x)+ 3.2(x-15)=390 from there I get (simplified) 6.4x= 438 \n" ); document.write( "-------- \n" ); document.write( " \n" ); document.write( " |