document.write( "Question 907637: A freight train with 80 cars transports coal and iron ore. Each car carries either 100 tons of coal or 90 tons of iron ore. Let c represent the number of cars carrying coal. Write and simplify an expression in terms of c for the total weight of the freight transported by the train \n" ); document.write( "
Algebra.Com's Answer #550503 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
c+i=80
\n" ); document.write( "100c+90i=w
\n" ); document.write( "
\n" ); document.write( "
\n" );