document.write( "Question 1145321: Jane travels to her grandmothers house which is 270km by car. She travels at an average speed of 50km/ hour on good roads and an average speed of 20km/hour on roads under construction. If the total trip took 6 hours, find the time it took to travel on the roads under construction, using the substitution or elimination.
\n" ); document.write( "Thanks
\n" ); document.write( "

Algebra.Com's Answer #766537 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
50*g+20*c=270
\n" ); document.write( "g+c=6
\n" ); document.write( "solve for c
\n" ); document.write( "g=6-c
\n" ); document.write( "50*g+20*c=270
\n" ); document.write( "50*(6-c)+20*c=270
\n" ); document.write( "
\n" );