document.write( "Question 417729: d=r*t
\n" ); document.write( "I need help finding the proper formula. I will solve the equation. just need help with utilizing proper formula. Thank you.
\n" ); document.write( " A trucker drove for 4 hours before he encountered icy road conditions. He reduced his speed by 20 MPH and continued driving for 3 more hours. find his average speed during the first part of the trip if the entire trip was 325 miles.
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Algebra.Com's Answer #292421 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
speed = x initially
\n" ); document.write( "distance = 4x
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\n" ); document.write( "then speed = x-20
\n" ); document.write( "distance = 3(x-20)
\n" ); document.write( "...
\n" ); document.write( "4x+3(x-20)=325
\n" ); document.write( "4x+3x-60=325
\n" ); document.write( "7x=385
\n" ); document.write( "/7
\n" ); document.write( "x=55 mph initially
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